CN102280940A - new energy distributed energy storage application control system - Google Patents
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Abstract
The invention relates to a new energy distributed energy storage application control system. The system comprises a new energy power generation device, an energy storage unit, a power generation/energy storage control unit, an inverter unit and the like, and a system master control unit, wherein the power generation/energy storage control unit is connected with the new energy power generation device, the energy storage unit, the inverter unit and a power grid, and communicates with the system master control unit and the energy storage unit. Under the control of the system master control unit, the power generation/energy storage control unit can convert electricity generated by the new energy power generation device or the alternating current of the power grid and store electric energy in the energy storage unit, can directly invert the electricity into alternating current and supply the alternating current to the power grid or an alternating current load, and can invert the electric energy stored in the energy storage unit into alternating current and supply the alternating current to the power grid or the alternating current load. The power generation efficiency of the new energy power generation device in a practical application environment can be furthest improved, the peak and valley adjusting function of the power grid can be realized, the electric energy of the power grid is reasonably utilized, and electric energy waste is reduced.
Description
Technical field
The present invention relates to the storage of electric energy and, specifically be meant solar energy, electrical network electrical power storage in energy storage device (as battery pack) from fields such as net, parallel network reverse generatings, in needs again from a kind of control system of net or parallel network reverse generating.
Background technology
In field of photovoltaic power generation, the small-sized photovoltaic from the net generating that utilizes pattern to mainly contain accompanying drawing 1 of solar energy at present commonly used utilizes pattern, and the photovoltaic of the large-sized photovoltaic electric station grid connection generating of accompanying drawing 2 utilizes the photovoltaic of the large-scale energy-accumulating power station of pattern and accompanying drawing 3 to utilize pattern etc. several.
The low profile photovoltaic of accompanying drawing 1 utilizes pattern to be fit to be applied in occasions such as street lamp, billboard, low profile photovoltaic architecture-integral, the generating of roof, residence from the net generating, because of not accepting the scheduling of electrical network, the electric energy that stores may can not or power to the load solar battery array to battery energy storage because of long-time non-loaded consuming, cause very big waste, system economy is not high.
Generating electricity by way of merging two or more grid systems of the large-sized photovoltaic power station of accompanying drawing 2 utilizes pattern, uses more.At present, this photovoltaic plant scale is also smaller, and the influence that electrical network is caused of generating electricity by way of merging two or more grid systems is also smaller, when the large-sized photovoltaic power plant construction reaches certain scale, will certainly cause very big puzzlement to electrical network.Because photovoltaic generation is extremely unsettled, have daytime, and do not have evening, even also be extremely unsettled daytime, therefore, electric power system is difficult to dispatching management.A lot of piece solar panels need be laid in the large-sized photovoltaic power station, conflux through the header box parallel connection after the polylith solar panel series connection again, are input to the hundreds of kilowatt of many parallel connections even the inverter of MW class then, generate electricity by way of merging two or more grid systems through inverter.A lot of series-parallel shortcomings of piece solar panel are that the output of whole solar cell array is to be benchmark with that the poorest string solar cell of generating effect, it is serious that solar battery array also is subjected to the influence of cloud layer, building shade, dust, temperature, circuit distribution impedance of environment of living in etc., and solar battery array may form the maximum power point of a plurality of continuous variations.Generally, the maximum power tracing function of solar cell all is to be integrated in the inverter, and therefore, inverter might not be to be operated on the maximum power point of actual the best, causes photovoltaic power station power generation efficient not high, and the photovoltaic plant returns of investment are not high.
The large-scale energy-accumulating power station of accompanying drawing 3 forms in order to alleviate the power supply dispatching problem.When network load is heavy, the electric energy that electric energy or solar battery array produced of large-scale energy-storage units array stores can be generated electricity by way of merging two or more grid systems through inverter, when network load was light, electric energy that can electrical network is unnecessary temporarily was stored in the large-scale energy-storage units array, is prepared for urgent need.The pattern of utilizing this kind can play alleviates the power supply dispatching problem; but this large-scale energy-accumulating power station is built in investment; need acreage property and many large-scale energy storage batteries; conflict with the situation formation that is becoming tight current land resource day; large-scale energy storage also needs to consider with the fail safe of battery centralized configuration; and; wherein certain solar panel, certain storage battery or certain powerful device go wrong when energy-accumulating power station; to make in the energy-accumulating power station large stretch of equipment downtime wait to repair; can't carry out the dispatching of power netwoks instruction; cause significant wastage, investment return reduces.
Therefore, be necessary to study new energy storage inversion electricity generation system and solve the problems referred to above.
Summary of the invention
The technical problem that the present invention need solve is:
(1), solves photovoltaic generating system makes the solar energy utilization ratio reduction because of the short slab effect of solar cell problem;
(2), solve existing energy-accumulating power station and take a large amount of land resources, maintenance cost height, the problem that benefit is low;
(3), solve existing photovoltaic generating system and do not have the problem that peak load regulation network is transferred the paddy function;
(4), solve the problem of electrical power storage more than needed.
For solving the problems of the technologies described above, the technical scheme that circuit of the present invention is taked is:
Provide a kind of new forms of energy distributed stored energy application control system, comprise system's Master Control Unit and one or more subsystem that is subjected to Master Control Unit control.Each subsystem comprises the corresponding following functional unit that is provided with of one or more quantity respectively: the generation of electricity by new energy device, adopt solar battery array or wind turbine generator or the two combination, and be connected with generating/energy storage control unit and be subjected to this unit controls; Energy-storage units is made up of energy storage device connection in series-parallel such as storage battery or super capacitors, is connected the storage that is subjected to this unit controls to realize electric energy with generating/energy storage control unit; Generating/energy storage control unit with system's Master Control Unit communication, is accepted the conversion that system's Master Control Unit order realizes electric energy in the system; The conversion of described electric energy comprise transformation of electrical energy two-way between electrical network and the energy-storage units, generation of electricity by new energy device to electrical network, generation of electricity by new energy device to AC load, generation of electricity by new energy device to the electric energy conversion of energy-storage units, energy-storage units to AC load; And energy-storage units and the state information of self sent to system's Master Control Unit; Inverter unit, adopt two-way inverter circuit, be connected with generating/energy storage control unit, be subjected to the control of system Master Control Unit to finish transformation of electrical energy two-way between electrical network and the energy-storage units and the generation of electricity by new energy device is changed to the electric energy of the electric energy conversion of AC load to AC load, energy-storage units to electrical network, generation of electricity by new energy device; From the net/control unit that is incorporated into the power networks, be connected between inverter unit and the AC load, be subjected to system's Master Control Unit control to realize switching of AC load and electrical network for electricity consumption.Each subsystem is configurable in an independent construction area.
Further, described system Master Control Unit and the communication of power system monitor dispatching patcher are subjected to the power system monitor dispatching patcher to dispatch the trend of electric energy in the coordinated control system.
Further, described energy-storage units inside has battery management system (BMS); Described generating/energy storage control unit also with battery management system (BMS) communication of energy-storage units, realize the energy-storage units condition monitoring.
Perhaps, the present invention adopts another kind of approximate schemes: the distributed stored energy application control system of described new forms of energy comprises that a system's Master Control Unit and an inverter unit, from the net/control unit that is incorporated into the power networks, comprise the energy-storage units of one or more generation of electricity by new energy devices, corresponding generation of electricity by new energy device quantity, the generating/energy storage control unit of corresponding generation of electricity by new energy device quantity in addition.Above-mentioned generation of electricity by new energy device, energy-storage units, generating/energy storage control unit are one group, every group is arranged in the zone, shared one road inverter unit of above-mentioned three functional modules and one tunnel is collected to inverter unit from the net/control unit that is incorporated into the power networks by connection line.
Wherein the function of each module and a last scheme are similar, that is: the generation of electricity by new energy device adopts solar battery array or wind turbine generator or the two combination, are connected with generating/energy storage control unit to be subjected to this unit controls; Energy-storage units is made up of energy storage device connection in series-parallel such as storage battery or super capacitors, is connected the storage that is subjected to this unit controls to realize electric energy with generating/energy storage control unit; The conversion that system's Master Control Unit order realizes electric energy in the system is accepted in generating/energy storage control unit and system's Master Control Unit communication; The conversion of described electric energy comprise transformation of electrical energy two-way between electrical network and the energy-storage units, generation of electricity by new energy device to electrical network, generation of electricity by new energy device to AC load, generation of electricity by new energy device to the electric energy conversion of energy-storage units, energy-storage units to AC load; And energy-storage units and the state information of self sent to system's Master Control Unit.Inverter unit adopts two-way inverter circuit, be connected with each generating/energy storage control unit, be subjected to the control of system Master Control Unit to finish transformation of electrical energy two-way between electrical network and the energy-storage units and the generation of electricity by new energy device is changed to the electric energy of the electric energy conversion of AC load to AC load, energy-storage units to electrical network, generation of electricity by new energy device.From the net/control unit that is incorporated into the power networks, be connected between inverter unit and the AC load, be subjected to system's Master Control Unit control to realize switching of AC load and electrical network for electricity consumption.Each subsystem is configurable in an independent construction area.
Further, described system Master Control Unit and the communication of power system monitor dispatching patcher are subjected to the power system monitor dispatching patcher to dispatch the trend of electric energy in the coordinated control system.
Further, described energy-storage units inside has battery management system (BMS); Described generating/energy storage control unit also with battery management system (BMS) communication of energy-storage units, realize the energy-storage units condition monitoring.
With respect to prior art, beneficial effect of the present invention is:
1), system of the present invention can realize the storage utilization of multiple electric energy more than needed, and then realize the function of the peak regulation accent paddy of electrical network; Its each functions of modules design is independent, perfect, each functions of modules complements each other, be applied in the large-scale energy-accumulating power station, when certain unit breaks down, directly related energy storage and the generator unit cisco unity malfunction of equipment therewith only, can not make a big impact to whole system, maintenance and engineering and the cost safeguarded are all smaller;
2), in the system of the present invention crucial building blocks such as generation of electricity by new energy device, energy-storage units, generating/energy storage control unit, inverter unit can dispersed placement in certain zone on roof, curtain wall, the plot of leaving unused of building, need not to open up in addition the soil these generating equipments are installed, save resource;
3), adopt system of the present invention can cancel the lightning protection header box that must dispose in the existing solar power generation inversion system, and can cancel the MPPT maximum power point tracking function of inverter unit, finish these functions and change by generating/energy storage control unit, can guarantee to greatest extent that each generation of electricity by new energy device all is operated near separately the maximum power point, improves generation of electricity by new energy device generating efficiency.
Description of drawings
Fig. 1 is that the middle-size and small-size photovoltaic from the net generating of prior art utilizes the pattern schematic block diagram;
Fig. 2 is that the photovoltaic of the medium-and-large-sized photovoltaic electric station grid connection generating of prior art utilizes the pattern principle schematic;
Fig. 3 is that the photovoltaic of the medium-and-large-sized energy-accumulating power station of prior art utilizes pattern diagram;
Fig. 4 is the distributed stored energy application control system of a new forms of energy of the present invention theory of constitution schematic diagram;
Fig. 5 is another embodiment theory of constitution schematic diagram of the distributed stored energy application control system of new forms of energy of the present invention.
Embodiment
For the ease of those skilled in the art will recognize that the present invention is described in further detail below in conjunction with specific embodiment and accompanying drawing.
As Fig. 4, the distributed stored energy application control system of the described new forms of energy of this embodiment comprises generation of electricity by new energy device, generating/energy storage control unit, energy-storage units, inverter unit, from the net/control unit that is incorporated into the power networks, system's Master Control Unit, power system monitor dispatching patcher.
It is applied in the large-scale energy-accumulating power station application system, described generating/energy storage control unit is connected with generation of electricity by new energy device, energy-storage units, AC network, system's Master Control Unit, generating/energy storage control unit is by battery management system (BMS) communication of connection and energy-storage units, monitoring energy-storage units state, also by connection and system's Master Control Unit communication, receiving system Master Control Unit instruction and send the state information of energy-storage units, generation of electricity by new energy device to system's Master Control Unit.Generation of electricity by new energy device 1, energy-storage units 1, generating/energy storage control unit 1 are configured in zone one; Generation of electricity by new energy device 2, energy-storage units 2, generating/energy storage control unit 2 are configured in the zone two; Generation of electricity by new energy device n, energy-storage units n, generating/energy storage control unit n are configured in the regional N, be configured in the zone one, two ... the generating of N/energy storage control unit 1,2 ... the output-parallel of n together, as the input of inverter unit, inverter unit and system Master Control Unit, AC network and be connected from the net/control unit that is incorporated into the power networks.Inverter unit and from the instruction of the net/control unit receiving system that is incorporated into the power networks Master Control Unit, when load needs, be operated in power to the load from the net pattern, when the generation of electricity by new energy device can generate electricity and electrical network when dispatching requirement is arranged, be operated in the pattern that is incorporated into the power networks to grid generation, when the generation of electricity by new energy device can not sent out electricity, generating/energy storage control unit 1,2, n can instruct by the receiving system Master Control Unit, with the electrical network electric energy behind rectification and power factor correction and high frequency conversion to energy-storage units 1,2, the n energy storage, by the rational management of power system monitor dispatching patcher, can realize the peak regulation of AC network is transferred the function of paddy.The function of the no longer integrated maximum power tracing of inverter unit, and the function of maximum power tracing is joined in generating/energy storage control unit, make the generation of electricity by new energy device all generate electricity, make whole generation of electricity by new energy apparatus system generating efficiency maximization by maximum power separately.
Above-mentioned distributed energy storage inversion system has six kinds of mode of operations at least, is described in detail below in conjunction with accompanying drawing 4.
Pattern one: the generation of electricity by new energy device generates electricity can storage mode., energy-storage units electric weight deficiency normal in generation of electricity by new energy device generating, power system monitor dispatching patcher are not sent out under dispatch command, the idle condition of AC load, the generation of electricity by new energy device generates electricity can be through the control of generating/energy storage control unit to the energy-storage units energy storage, the BMS system communication of generating/energy storage control unit and energy-storage units, real time intelligent control energy-storage units state, guaranteeing that energy storage is safe and reliable carries out.
Pattern two: electrical network electrical power storage pattern.Under the situation of can not generate electricity at the generation of electricity by new energy device, energy-storage units electric weight deficiency and network load are heavy, the power system monitor dispatching patcher is sent instruction, generating/energy storage control unit charge inside control module is started working, and the electrical network electrical power storage is in energy-storage units.
Pattern three: the generation of electricity by new energy device generates electricity and can not only store simultaneously but also the pattern of parallel network reverse generating.Have that generation of electricity by new energy device generating is normal, energy-storage units electric weight deficiency, power system monitor dispatching patcher have under dispatch command, the idle condition of AC load, when the electric energy that the generation of electricity by new energy device produces was controlled to the energy-storage units energy storage through generating/energy storage control unit, generating/energy storage control unit output stable DC electricity generated electricity by way of merging two or more grid systems through inverter unit.
Pattern four: the pattern that the generation of electricity by new energy device generates electricity and can not only store the while but also generate electricity from the net inversion.What this pattern and pattern three were different is that inverter unit is not incorporated into the power networks, and only the AC load in the zone is powered.
Pattern five: the pattern of the electric energy parallel network reverse generating of storage.Under the situation of can not generate electricity at the generation of electricity by new energy device, energy-storage units electric weight abundance and network load are heavy, the power system monitor dispatching patcher is sent instruction, and the electric energy of storage generates electricity by way of merging two or more grid systems through generating/energy storage control unit and inverter unit.
Pattern six: the electric energy of storage is from the pattern of net inversion generating.What this pattern and pattern five were different is that inverter unit is not incorporated into the power networks, and only the AC load in the zone is powered.
Be distributed in certain regional generation of electricity by new energy device 1 in the distributed energy storage inversion system, generating/energy storage control unit 1, energy-storage units 1 be distributed in another regional generation of electricity by new energy device 2, generating/energy storage control unit 2, energy-storage units 2 or be distributed in other regional generation of electricity by new energy device n, generating/energy storage control unit n, energy-storage units n when be operated in the energy storage state, when be operated in generating state, decide by the current state of system's Master Control Unit fully according to generation of electricity by new energy device, energy-storage units, AC network and other equipment gathered.
Fig. 5 is another embodiment composition frame chart of system of the present invention.It relatively is fit to be applied to small-sized grid-connected power generation system.Embodiment illustrated in fig. 5 and embodiment illustrated in fig. 4ly different be, the direct current output of each generating/energy storage control unit is not connected in parallel, but connecting small-sized inverter unit separately, inverter unit connects from the net/control unit that is incorporated into the power networks, then from net or generate electricity by way of merging two or more grid systems.Generating/energy storage control unit of generation of electricity by new energy device configuration, energy-storage units, inverter unit, one from net/control unit is incorporated into the power networks, these modules are one group, be configured in the same area, its mode of operation and principle and embodiment illustrated in fig. 4 similar do not repeat them here.
Not specifically described functional unit all can adopt ripe functional module of the prior art among the present invention, does not repeat them here.
Need to prove; above-mentioned execution mode only is the preferable embodiment of the present invention; it can not be interpreted as limiting the scope of the invention, conceive under the prerequisite not breaking away from the present invention that any impartial the variation with modifying all belonged to protection scope of the present invention to the present invention does.
Claims (10)
1. the distributed stored energy application control system of new forms of energy is characterized in that, comprises system's Master Control Unit, and the corresponding following functional unit that is provided with of one or more quantity:
The generation of electricity by new energy device adopts solar battery array or wind turbine generator or the two combination, is connected with generating/energy storage control unit to be subjected to this unit controls;
Energy-storage units is made up of energy storage device connection in series-parallel such as storage battery or super capacitors, is connected the storage that is subjected to this unit controls to realize electric energy with generating/energy storage control unit;
Generating/energy storage control unit with system's Master Control Unit communication, is accepted the conversion that system's Master Control Unit order realizes electric energy in the system; The conversion of described electric energy comprise transformation of electrical energy two-way between electrical network and the energy-storage units, generation of electricity by new energy device to electrical network, generation of electricity by new energy device to AC load, generation of electricity by new energy device to the electric energy conversion of energy-storage units, energy-storage units to AC load; And energy-storage units and the state information of self sent to system's Master Control Unit;
Inverter unit, adopt two-way inverter circuit, be connected with generating/energy storage control unit, be subjected to the control of system Master Control Unit to finish transformation of electrical energy two-way between electrical network and the energy-storage units and the generation of electricity by new energy device is changed to the electric energy of the electric energy conversion of AC load to AC load, energy-storage units to electrical network, generation of electricity by new energy device;
From the net/control unit that is incorporated into the power networks, be connected between inverter unit and the AC load, be subjected to system's Master Control Unit control to realize switching of AC load and electrical network for electricity consumption.
2. the distributed stored energy application control system of new forms of energy according to claim 1 is characterized in that, described system Master Control Unit and the communication of power system monitor dispatching patcher are subjected to the power system monitor dispatching patcher to dispatch the trend of electric energy in the coordinated control system.
3. the distributed stored energy application control system of new forms of energy according to claim 2 is characterized in that described energy-storage units inside has battery management system (BMS).
4. the distributed stored energy application control system of new forms of energy according to claim 3 is characterized in that, described generating/energy storage control unit also with battery management system (BMS) communication of energy-storage units, realize the energy-storage units condition monitoring.
5. the distributed stored energy application control system of new forms of energy according to claim 4, it is characterized in that, described system is a subsystem with one group of generation of electricity by new energy device of correspondence setting, energy-storage units, generating/energy storage control unit, inverter unit, from net/be incorporated into the power networks control unit and AC load, and each subsystem configures is in an independent construction area.
6. the distributed stored energy application control system of new forms of energy is characterized in that, comprising:
One system's Master Control Unit;
One or more generation of electricity by new energy devices adopt solar battery array or wind turbine generator or the two combination, are connected with generating/energy storage control unit to be subjected to this unit controls;
The energy-storage units of corresponding generation of electricity by new energy device quantity is made up of energy storage device connection in series-parallel such as storage battery or super capacitors, is connected the storage that is subjected to this unit controls to realize electric energy with generating/energy storage control unit;
Generating/energy storage the control unit of corresponding generation of electricity by new energy device quantity with system's Master Control Unit communication, is accepted the conversion that system's Master Control Unit order realizes electric energy in the system; The conversion of described electric energy comprise transformation of electrical energy two-way between electrical network and the energy-storage units, generation of electricity by new energy device to electrical network, generation of electricity by new energy device to AC load, generation of electricity by new energy device to the electric energy conversion of energy-storage units, energy-storage units to AC load; And energy-storage units and the state information of self sent to system's Master Control Unit;
One inverter unit, adopt two-way inverter circuit, be connected with each generating/energy storage control unit, be subjected to the control of system Master Control Unit to finish transformation of electrical energy two-way between electrical network and the energy-storage units and the generation of electricity by new energy device is changed to the electric energy of the electric energy conversion of AC load to AC load, energy-storage units to electrical network, generation of electricity by new energy device;
One from the net/control unit that is incorporated into the power networks, and is connected between above-mentioned inverter unit and the AC load, is subjected to system's Master Control Unit control to realize switching for electricity consumption of AC load and electrical network.
7. the distributed stored energy application control system of new forms of energy according to claim 6 is characterized in that, described system Master Control Unit and the communication of power system monitor dispatching patcher are subjected to the power system monitor dispatching patcher to dispatch the trend of electric energy in the coordinated control system.
8. the distributed stored energy application control system of new forms of energy according to claim 7 is characterized in that described energy-storage units inside has battery management system (BMS).
9. the distributed stored energy application control system of new forms of energy according to claim 8 is characterized in that, described generating/energy storage control unit also with battery management system (BMS) communication of energy-storage units, realize the energy-storage units condition monitoring.
10. the distributed stored energy application control system of new forms of energy according to claim 9, it is characterized in that, described system is one group with generation of electricity by new energy device, energy-storage units, the generating/energy storage control unit of correspondence setting, every group is arranged in the zone, is collected to inverter unit by connection line.
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