CN101404410A - Green energy resource and network-electricity parallel operation method - Google Patents
Green energy resource and network-electricity parallel operation method Download PDFInfo
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- CN101404410A CN101404410A CNA2008101949649A CN200810194964A CN101404410A CN 101404410 A CN101404410 A CN 101404410A CN A2008101949649 A CNA2008101949649 A CN A2008101949649A CN 200810194964 A CN200810194964 A CN 200810194964A CN 101404410 A CN101404410 A CN 101404410A
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Abstract
The invention discloses a method for supplying power through the connection of green energy sources and a network power in parallel. In the method, a parallel power supply conversion device is used for supplying power to a function device through the DC mode of connecting the green energy sources and the network power in parallel, that is, the power energy given out by the green energy sources like solar energy and wind power are connected with the network power (a common AC power) in parallel for supplying power to a load; when the generated energy of the green energy sources is large enough, the green energy resources are preferably used and the power of a power network is even not used, thus reducing the energy demand of the load to the power network.
Description
Technical field
The present invention relates to electric supply system, particularly a kind of green energy resource and network-electricity parallel operation method.
Background technology
In order to solve the problem of aspects such as energy shortage and ecological deterioration, people are seeking reproducible green energy resource in recent years.Up to the present, the existing 5 kinds of renewable green energy resource technology in the whole world reach commercialization or near the commercialization level, as solar energy, wind energy, water energy and source, ground can etc.The operational version of the green energy resource system of current trend has:
1, the supply power mode that is incorporated into the power networks is utilized parallel network reverse equipment, and the electricity that green energy resources such as wind-force, solar energy are sent in real time and receive on the electrical network;
2, independently-powered mode, the electricity that green energy resources such as wind-force, solar energy are sent charges in the energy storage devices such as storage battery, by contravariant equipment the direct current energy in the energy storage device is reverse into the required electric energy form of equipment again;
3, complementary power supply, the electricity that green energy resources such as wind-force, solar energy are sent charges in the energy storage devices such as storage battery, by contravariant equipment the direct current energy in the energy storage device being reverse into the alternating current supply equipment again uses, when the electric energy that sends when the green energy resource system does not satisfy the load needs, then switch on the electrical network, supply electric energy by common net electricity and give equipment.
In the such scheme, scheme one is too high and immature because of the grid-connection device cost, and the user can't accept, and the approval and the agreement of the local power department of needs that is incorporated into the power networks, and electric power system is considered for safety and economy interests aspect, generally do not agreed; The configuration of scheme two battery capacitys is bigger, and system's investment is higher, and maintenance cost is than higher; Scheme three is because of the unsteadiness of green energy resource, and system is switched in the two kinds of supply power modes of being everlasting, and influences the operate as normal of equipment.
Summary of the invention
The objective of the invention is to: a kind of green energy resource and network-electricity parallel operation method are provided, and this method makes the power supply unit cost lower, existing electrical network is not impacted, and need not to switch between two kinds of electric energy modes.
Technical solution of the present invention is: this method is the effector power supply by the parallel operation reforming unit with green energy resource and the electric direct current mode with parallel connection of net, be green energy resource and net electricity parallel operation reforming unit, the linkage function device on the parallel operation reforming unit of inserting in parallel; Described parallel operation reforming unit comprises voltage changer, rectifier, connects voltage changer on the generator of green energy resource, and the net electricity inserts rectifier through lead, and voltage changer and rectifier are with parallel way linkage function device.
In green energy resource of the present invention and the network-electricity parallel operation method, current detector is installed on the voltage changer.
In green energy resource of the present invention and the network-electricity parallel operation method, voltage detector is installed on the rectifier.
In green energy resource of the present invention and the network-electricity parallel operation method, voltage changer is connected transformer with rectifier with parallel way, linkage function device on the transformer.
During use, detector detection net electricity is the output DC flow valuve after conversion through output dc voltage value behind the rectifying conversion and green energy resource, after logical process and intelligent computing, regulate the width of PWM driving pulse, make the voltage after the electric conversion of a little higher than net of magnitude of voltage of green energy resource output, thereby preferentially use the electric energy of green energy resource, guarantee farthest to reduce to netting the electric weight demand of electricity.
The present invention has the following advantages: 1, the inventive method is given load by the parallel operation reforming unit with the real-time priority of supply of electric energy that the green energy resource electricity generation system sends, and reduces the dependence to the electrical network energy; 2, the inventive method is carried out irreversible stack by the parallel operation reforming unit with green energy resource and electrical network, has guaranteed that electrical network and green energy resource supply load do not need switching device shifter when using; 3, green energy resource in the inventive method and NetTone Communicator are crossed corresponding conversion, finally formed the parallel way of direct current, DC power supply after the parallel connection can't be carried out feedback, impact with green energy resource to original net electricity, it is a kind of irreversible supply power mode, electrical network is not existed interference and influence, thereby do not need the permission of power supply department; 4, the system cost of the inventive method is cheap nearly 1/3 from net inversion system, grid-connected system, and does not need examining of power supply department, and is easy to implement; 5, the inventive method is mainly used in stably, constantly in the power requirement occasion, as oil-field oil pumper, communication base station etc., reduces open-air net circuitry lines investment and consumable.
Description of drawings
Fig. 1 is a principle of the invention block diagram.
Fig. 2 is the parallel operation reforming unit theory diagram of Fig. 1.
Fig. 3 is one of the execution mode of a Fig. 2 principle schematic.
Fig. 4 is two principle schematic of the execution mode of Fig. 2.
Embodiment
As shown in Figure 1, 2, this method is the effector power supply by the parallel operation reforming unit with green energy resource and the electric direct current mode with parallel connection of net, i.e. green energy resource and the parallel connection of net electricity inserts parallel operation reforming unit, linkage function device on the parallel operation reforming unit; Described parallel operation reforming unit comprises voltage changer, rectifier, connects voltage changer on the generator of green energy resource, and the net electricity inserts rectifier through lead, and voltage changer and rectifier are with parallel way linkage function device.
In green energy resource of the present invention and the network-electricity parallel operation method, current detector is installed on the voltage changer.
In green energy resource of the present invention and the network-electricity parallel operation method, voltage detector is installed on the rectifier.
In green energy resource of the present invention and the network-electricity parallel operation method, voltage changer is connected transformer with rectifier with parallel way, linkage function device on the transformer.
During use, detector detection net electricity is the output DC flow valuve after conversion through output dc voltage value behind the rectifying conversion and green energy resource, after logical process and intelligent computing, regulate the width of PWM driving pulse, make the voltage after the electric conversion of a little higher than net of magnitude of voltage of green energy resource output, thereby preferentially use the electric energy of green energy resource, guarantee farthest to reduce to netting the electric weight demand of electricity.
Example 1: green energy resource and network-electricity parallel operation oil pumper:
As shown in Figure 3, the electricity that green energy resources such as solar energy, wind-force send becomes the direct current of high pressure after at first handling through variator, and this variator has the maximal power tracing function, can regulate the PWM arteries and veins and fill width and make the electricity generation system maximizes power; The net electricity is through after the three-phase bridge rectification, become the direct current about 540V, voltage detector is used for following the tracks of, detect the direct voltage after the electric three-phase bridge rectification of net, current detector is used for detecting the current value of green energy resource conversion output, sampled value according to direct voltage, direct current, through logical process, change the pwm pulse width, to greatest extent electric energy that provide are provided more; Net DC power supply that direct voltage and green energy resource conversion after the electric three-phase bridge rectification produce and the frequency converter of special use is powered after in parallel, again pumping-unit motor is carried out frequency conversion drive by frequency converter.
Example 2: green energy resource and network-electricity parallel operation communication base station
As shown in Figure 4, the electricity that green energy resources such as solar energy, wind power generation send becomes the direct current of high pressure after at first handling through variator, and this variator has the maximal power tracing function, can regulate the PWM arteries and veins and fill width and make the electricity generation system maximizes power; The net electricity becomes the direct current about 400V through behind the single-phase bridge rectification; Voltage detector is used for following the tracks of, detect the direct voltage behind the net electric rectification, current detector is used for detecting the current value of converter output, according to the sampled value of direct voltage, direct current, through logical process, change the pwm pulse width, to greatest extent electric energy that provide are provided more; After the DC power supply that direct voltage and green energy resource conversion produce behind the net electric rectification was in parallel, DC/DC carried out the direct current that step-down becomes 48V, and communication equipment is powered.
Claims (4)
1. green energy resource and network-electricity parallel operation method, it is characterized in that: this method is the effector power supply by the parallel operation reforming unit with green energy resource and the electric direct current mode with parallel connection of net, be green energy resource and net electricity parallel operation reforming unit, the linkage function device on the parallel operation reforming unit of inserting in parallel; Described parallel operation reforming unit comprises voltage changer, rectifier, connects voltage changer on the generator of green energy resource, and the net electricity inserts rectifier through lead, and voltage changer and rectifier are with parallel way linkage function device.
2. green energy resource according to claim 1 and network-electricity parallel operation method is characterized in that: current detector is installed on the voltage changer.
3. green energy resource according to claim 1 and network-electricity parallel operation method is characterized in that: voltage detector is installed on the rectifier.
4. green energy resource according to claim 1 and network-electricity parallel operation method is characterized in that: voltage changer is connected transformer with rectifier with parallel way, linkage function device on the transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101949649A CN101404410A (en) | 2008-10-27 | 2008-10-27 | Green energy resource and network-electricity parallel operation method |
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| CNA2008101949649A CN101404410A (en) | 2008-10-27 | 2008-10-27 | Green energy resource and network-electricity parallel operation method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800437A (en) * | 2010-03-22 | 2010-08-11 | 杭州东冠通信建设有限公司 | Wind/grid generating device for communication |
| CN101882797A (en) * | 2010-06-11 | 2010-11-10 | 上海晨昌动力科技有限公司 | Method for efficiently emerging marsh gas power generation into user power utilization network |
| CN101969209A (en) * | 2010-09-29 | 2011-02-09 | 上海晨昌动力科技有限公司 | Methane household intelligent power generation method |
| CN102222968A (en) * | 2011-06-17 | 2011-10-19 | 薛建仁 | AC (Alternate Current) complementation method for multipower system |
| CN102460335A (en) * | 2009-04-09 | 2012-05-16 | E3绿色科技企业公司 | System and method for energy consumption management |
| US8486853B2 (en) | 2009-03-04 | 2013-07-16 | Nissan Motor Co., Ltd. | Exhaust gas purifying catalyst and method for manufacturing the same |
| CN103701309A (en) * | 2013-12-03 | 2014-04-02 | 广东科龙空调器有限公司 | Alternating-direct current power supply system for variable frequency equipment and variable frequency air conditioner |
-
2008
- 2008-10-27 CN CNA2008101949649A patent/CN101404410A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8486853B2 (en) | 2009-03-04 | 2013-07-16 | Nissan Motor Co., Ltd. | Exhaust gas purifying catalyst and method for manufacturing the same |
| CN102460335A (en) * | 2009-04-09 | 2012-05-16 | E3绿色科技企业公司 | System and method for energy consumption management |
| CN102460335B (en) * | 2009-04-09 | 2015-07-01 | 智能能源解决方案有限责任公司 | System and method for energy consumption management |
| CN101800437A (en) * | 2010-03-22 | 2010-08-11 | 杭州东冠通信建设有限公司 | Wind/grid generating device for communication |
| CN101882797A (en) * | 2010-06-11 | 2010-11-10 | 上海晨昌动力科技有限公司 | Method for efficiently emerging marsh gas power generation into user power utilization network |
| CN101882797B (en) * | 2010-06-11 | 2013-01-16 | 上海晨昌动力科技有限公司 | Method for efficiently emerging marsh gas power generation into user power utilization network |
| CN101969209A (en) * | 2010-09-29 | 2011-02-09 | 上海晨昌动力科技有限公司 | Methane household intelligent power generation method |
| CN102222968A (en) * | 2011-06-17 | 2011-10-19 | 薛建仁 | AC (Alternate Current) complementation method for multipower system |
| CN103701309A (en) * | 2013-12-03 | 2014-04-02 | 广东科龙空调器有限公司 | Alternating-direct current power supply system for variable frequency equipment and variable frequency air conditioner |
| CN103701309B (en) * | 2013-12-03 | 2016-03-09 | 广东科龙空调器有限公司 | Frequency conversion equipment supplied by AC/DC electricity system and transducer air conditioning |
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