CN203537039U - Hybrid energy system applied to distribution grid automation electric operation - Google Patents
Hybrid energy system applied to distribution grid automation electric operation Download PDFInfo
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- CN203537039U CN203537039U CN201320640203.8U CN201320640203U CN203537039U CN 203537039 U CN203537039 U CN 203537039U CN 201320640203 U CN201320640203 U CN 201320640203U CN 203537039 U CN203537039 U CN 203537039U
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- 238000004891 communication Methods 0.000 claims abstract description 14
- 239000000178 monomer Substances 0.000 claims description 13
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- 230000008569 process Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 13
- 238000012545 processing Methods 0.000 description 8
- 238000005070 sampling Methods 0.000 description 7
- 238000007667 floating Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
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- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The utility model discloses a hybrid energy system applied to distribution grid automation electric operation, and is characterized in that the hybrid energy system comprises a main power supply, a stand-by power supply and an energy collector; the main power supply and the energy collector are parallelly connected and respectively charge the stand-by power supply through respective charging modules; the main power supply is a PC/CT directly connected with a ring main unit bus, and low-voltage power is output to supply a ring main unit detecting device, a communication device and an electric device with power and to charge the stand-by power supply; the energy collector is one or several of a photovoltaic energy collector, a wind power energy collector, a vibration energy collector, a radio frequency energy collector and a temperature difference energy collector; and the stand-by power supply is a super capacitor module group. Due to the fact that the super capacitor and the energy collector are used as hybrid energy to supply power, the hybrid energy system is advantaged by high energy utilization rate, reliable system operation, high duration capability and long service lifetime, thereby facilitating reconstructing a traditional ring main unit.
Description
Technical field
The utility model relates to a kind of technical field that belongs to smart grid distribution automation, especially one is applied to the electrically operated ultracapacitor of distribution automation and energy harvester hybrid energy system system.
Background technology
Along with the propelling of electrical network upgrading, the concept of intelligent grid is brought into schedule in recent years.Existing electric network reconstruction to be become to intelligent grid, certainly will will carry out automatic improving as distribution network terminal equipment, such as ring main unit etc.On the one hand, in the distribution network terminal scrap build processes such as ring main unit, increase new equipment, comprise the motor-operating mechanism of Data Detection, data preparation, transfer of data and on-load switch, on the other hand, will provide power supply for whole newly-increased automatic operation system.
Power-supply system scheme is to adopt a bus power taking, installs lead-acid battery group additional as stand-by power supply.When electrical network is normal, by PT/CT, directly from the power taking of electrical network bus, after tuning, distribution automation terminal equipment is powered, when breaking down, use in electrical network lead-acid battery to carry out interim short time power supply as stand-by power supply.But use lead-acid battery stand-by power supply to have a lot of problems:
1. it is very large that lead-acid battery takes up an area space, at some distribution network terminal equipment, for example in the motorized operation transformation process of ring main unit, cannot be arranged on cabinet inside, and cost is very high.
2. utilize lead-acid battery as the electric operating power supply of distribution network terminal equipment, electric operating power demand is even higher up to 500W, and the electrically operated time is very short, so high power type power supply more has superiority than lead-acid battery.
3. lead-acid battery is high as stand-by power supply maintenance cost, and lead-acid battery cycle life is short.According to existing battery technology level, lead-acid battery cycle life is to the maximum several thousand times.
4. lead-acid battery is as reserve battery poor reliability.The plumbous lead-acid battery of use now of take is example, and its temperature range of operation is 0-50 ℃.And ring main unit is arranged on open air mostly, environment is severe, and especially in Middle-north Area, winter temperature is subzero through being everlasting, and the reliability of battery is had a greatly reduced quality.
5. lead-acid battery has pollution.Existing ring main unit reserve battery is in the majority with lead-acid battery, pollutes self-evident.
One of electric operating alternative power source is lithium ion battery, and lithium ion battery energy density is higher, yet lithium ion battery exists defect in cycle life, importantly its reliability and large heavy discount of fail safe under adverse circumstances.
Ultracapacitor owing to thering is high power density, have extended cycle life, the feature such as good environmental adaptability (40-70 ℃), the electric operating power supply of very applicable distribution automation terminal equipment, especially applicable at severe outdoor environment, its shortcoming is that energy density is low, and flying power is not enough.
Summary of the invention
The utility model object be the defect for prior art provide a kind of long service life, reliability, fail safe and economy the coordinating and unifying be applied to the electrically operated ultracapacitor of distribution automation and energy harvester hybrid energy system.
The utility model for achieving the above object, adopts following technical scheme:
Be applied to the electrically operated hybrid energy system of distribution automation, it is characterized in that: it comprises main power source, stand-by power supply and energy harvester; Described main power source and energy harvester in parallel and respectively the charging module by be separately that stand-by power supply charges; Wherein
Described main power source is PT/CT, and PT/CT is directly connected with ring main unit bus, and output low-tension supply is to ring main unit checkout gear, communication device and electric device power supply and stand-by power supply charging;
Described energy harvester is one or more of photovoltaic energy gatherer, wind energy energy harvester, vibrational energy collector, radio-frequency (RF) energy gatherer, temperature difference energy harvester;
Described stand-by power supply is ultracapacitor module.
It is further characterized in that: described ultracapacitor module is connected and/or composed in parallel by a plurality of ultracapacitor monomers processes, this module also comprises ultracapacitor management system, ultracapacitor management system be take pcb board as carrier, ultracapacitor module is carried out to condition monitoring, monomer voltage balance and unusual condition and report to the police.
Further: the one or more power supplies of described system output in main power source, stand-by power supply and energy harvester.
The utlity model has following advantage:
1. use ultracapacitor as stand-by power supply, can in the situation that not changing existing ring network cabinet body structure, realize automatic improving;
2. ultracapacitor can just meet and make, under the prerequisite of power consumption, to provide enough discharge powers, and capacity usage ratio is high;
3. ultracapacitor cycle life is up to more than 1,000,000 times, and serviceability temperature is-40 ℃-70 ℃, has guaranteed standby power system reliability of operation and non-maintaining;
4. energy harvester harvest energy storing in ultracapacitor back-up source, has strengthened the flying power of ultracapacitor.
5. hybrid energy system is guaranteed the monitoring under electrical breakdown state, the needed energy of communication and breaking-closing operating.Realized the operation requirements of smart grid distribution automatization terminal low-cost high-efficiency.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment 1 schematic diagram.
Embodiment
The utility model proposes a kind of electrically operated ultracapacitor of distribution automation and energy harvester hybrid energy system of being applied to.
Described energy system comprises main power source, stand-by power supply and energy harvester.
Described main power source is PT/CT, and PT/CT is directly connected with ring main unit bus, and output low-tension supply is powered and charges to stand-by power supply ring main unit checkout gear, communication device and electric device;
Described stand-by power supply is ultracapacitor module.
Described ultracapacitor module is by ultracapacitor monomer through connecting and/or composing in parallel, and amount of monomer used was determined by actual use procedure required voltage, power and malfunction operating time.
Described ultracapacitor module also comprises ultracapacitor management system, and ultracapacitor management system be take pcb board as carrier, ultracapacitor module is carried out to condition monitoring, monomer voltage balance and unusual condition and report to the police.
Described energy harvester is one or more of photovoltaic energy gatherer, wind energy energy harvester, vibrational energy collector, radio-frequency (RF) energy gatherer, temperature difference energy harvester.
The control strategy of this energy system is:
By energy harvester charging module, be directly stored among ultracapacitor module the energy priority that energy harvester is collected, when ultracapacitor is full of after electricity, continue to keep the floating charge of ultracapacitor module, keep ultracapacitor module always in full power state, when energy harvester power output is greater than the charge power of ultracapacitor module, the dump energy of energy harvester output is supplied with the power units such as electric operating, checkout gear and communication device.
When electrical network is normally worked, PT/CT continues from the power taking of electrical network bus, on the one hand to the power supply of distribution network terminal equipment power unit, is worked in coordination with ultracapacitor module is charged on the other hand by AC/DC charging module and energy harvester.When ultracapacitor is full of after electricity, collaborative energy harvester keeps the floating charge of ultracapacitor module, keeps ultracapacitor module always in full power state.
When electrical network breaks down, PT/CT cannot, from electrical network power taking, if now the power output of energy harvester is greater than distribution automation terminal plant capacity demand, keep floating charge state to ultracapacitor module when being powered by energy harvester; If the power output of energy harvester can not meet the operating power requirement of distribution automation terminal equipment, for example instantaneous power requires very large breaking-closing operating, by the collaborative energy harvester of ultracapacitor module, provides operating power simultaneously.
The concrete application scenario of selective basis of energy harvester kind is decided, and for example outdoor ring main unit selects photovoltaic cell as energy harvester; The coupling of energy harvester power is according to the energy storage capacity of back-up source, and operating time of energy harvester etc. is calculated coupling.
Embodiment 1:
In a certain 10KV outdoor ring main unit transformation process, the required power supply of ring main unit automation operating system (comprising data sampling and processing, communication and breaking-closing operating etc.) is 48V, maximum power requirement 500W, wherein electronic divide-shut brake require that change in voltage scope is 48V in a making process (about 70ms) 85% ~ 110%, in a separating brake process (about 50ms), change in voltage scope is 48V 65% ~ 120%, and in a thermal energy storage process (about 5s), change in voltage scope is 48V 85% ~ 110%.And require power-supply system can meet in 6 divide-shut brake cyclic processes and keep above-mentioned voltage range.After primary power source de-energizes, data sampling and processing and communication power supply require voltage 48V, maximum power 20W, average power 4W, 8 hours duration.
Back-up source ultracapacitor module calculates according to the required electric weight of ring main unit automation mechanized operation.Ultracapacitor module energy computing formula is
E=0.5C（V
m2-V
o2）
Wherein, E is the fully loaded electric weight of capacitor group, the J of unit; C is ultracapacitor module capacity, the F of unit; V
mfor ultracapacitor module rated voltage, the V of unit; V
ofor ultracapacitor module final discharging voltage, unit is V.
Generally, Vo=0.5Vm,
E=0.5C（V
m2-V
o2）=75%×0.5CV
m2
Can find out, ultracapacitor module depth of discharge, up to 75%, has fully been used the potential of ultracapacitor.
5 divide-shut brake cyclic process overall energy requirements are 500W * 5s * 2 * 6=30000J;
Coupling ultracapacitor adopts 2.7V 3000F ultracapacitor monomer, and monomer whose energy is 0.5 * 3000F * 2.7V * 2.7V=10935J;
2.7V 3000F ultracapacitor utilisable energy (calculating to discharge into 1.35V): 10935J * 0.75=8201J;
8 above-mentioned monomer composition module utilisable energy: 8201J * 8=65608J; Have a surplus for 2 times that are 6 energy that breaking-closing operating is learned.
Data sampling and processing and communication energy requirement are 4W * 8h=3 * 8 * 3600J=115200J, the ultracapacitor module utilisable energy that can find out 8 2.7V3000F ultracapacitor monomer compositions selecting is only 57% of data sampling and processing and communication energy requirement, the monomer number that increases ultracapacitor can increase larger cost and volume, so the present invention adopts the method for energy harvester and ultracapacitor module to form hybrid energy system.
Because this embodiment is outdoor ring main unit, select photovoltaic energy harvester and ultracapacitor module as hybrid energy system.Photovoltaic energy gatherer is 21V20W photovoltaic battery panel, at main power source under normal circumstances, is enough to meet the energy requirement of data sampling and processing and communication, and unnecessary Power supply ultracapacitor module is made it to keep floating charge state.When mains power failure, the power supply of the maintenance that photovoltaic energy gatherer can continue to data sampling and processing and communication system, and carry out, after electric operating, even after its voltage is down to minimum operation voltage, in 90 minutes, making it be full of electricity in the power supply of ultracapacitor module.
Select 8 of 2.7V 3000F ultracapacitor monomers to be composed in series 21.6V 375F ultracapacitor module as system backup power supply, this ultracapacitor modular volume is 600mm * 200mm * 130mm.
Select 21V20W photovoltaic battery panel as energy harvester, it is of a size of 520mm * 460mm * 25mm.
Embodiment of the present invention operation principle as shown in Figure 1.Under normal operating conditions, PT/CT is from looped network cabinet wire power taking, collaborative photovoltaic energy gatherer gathers ring main unit internal operation status data, by data processing module, image data is processed again, then by communication system, be transferred to distant place control centre, and by charging circuit, ultracapacitor is charged, after being full of electricity, capacitor group keeps floating charge state.When there is electric network fault suddenly, PT/CT cannot be from bus power taking, and photovoltaic energy gatherer is proceeded the power supply of data sampling and processing and communication system and kept ultracapacitor floating charge; When needs breaking-closing operating, ultracapacitor is inputted 48V voltage by booster circuit, according to order-driven motor, carry out breaking-closing operating, the present embodiment ultracapacitor module used can meet divide-shut brake circulation 12 times, now ultracapacitor module voltage is reduced to 10.8V, and booster circuit quits work; Even when energy harvester energy gathers very faint energy, still can charge to ultracapacitor module, normally environment can make ultracapacitor module be full of electricity in lower 90 minutes in the daytime.
Claims (3)
1. be applied to the electrically operated hybrid energy system of distribution automation, it is characterized in that: it comprises main power source, stand-by power supply and energy harvester; Described main power source and energy harvester in parallel and respectively the charging module by be separately that stand-by power supply charges; Wherein
Described main power source is PT/CT, and PT/CT is directly connected with ring main unit bus, and output low-tension supply is to ring main unit checkout gear, communication device and electric device power supply and stand-by power supply charging;
Described energy harvester is one or more of photovoltaic energy gatherer, wind energy energy harvester, vibrational energy collector, radio-frequency (RF) energy gatherer, temperature difference energy harvester;
Described stand-by power supply is ultracapacitor module.
2. the electrically operated hybrid energy system of distribution automation that is applied to according to claim 1, it is characterized in that: described ultracapacitor module is connected and/or composed in parallel by a plurality of ultracapacitor monomers processes, this module also comprises ultracapacitor management system, ultracapacitor management system be take pcb board as carrier, ultracapacitor module is carried out to condition monitoring, monomer voltage balance and unusual condition and report to the police.
3. the electrically operated hybrid energy system of distribution automation that is applied to according to claim 1 and 2, is characterized in that: the one or more power supplies of described system output in main power source, stand-by power supply and energy harvester.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320640203.8U CN203537039U (en) | 2013-10-16 | 2013-10-16 | Hybrid energy system applied to distribution grid automation electric operation |
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| CN201320640203.8U CN203537039U (en) | 2013-10-16 | 2013-10-16 | Hybrid energy system applied to distribution grid automation electric operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153167A (en) * | 2018-02-01 | 2018-06-12 | 上海金智晟东电力科技有限公司 | It can flexible configurations power distribution network dynamic model experiment platform and its method |
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2013
- 2013-10-16 CN CN201320640203.8U patent/CN203537039U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108153167A (en) * | 2018-02-01 | 2018-06-12 | 上海金智晟东电力科技有限公司 | It can flexible configurations power distribution network dynamic model experiment platform and its method |
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| C14 | Grant of patent or utility model | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: No. 288 Lake Technology Park eighteen Bay Road District 214100 in Jiangsu province Wuxi City foreshore building No. 2 Patentee after: GMCC ELECTRONIC TECHNOLOGY WUXI Co.,Ltd. Address before: No. 288 Lake Technology Park eighteen Bay Road District 214100 in Jiangsu province Wuxi City foreshore building No. 2 Patentee before: HYPERION ELECTRONIC TECHNOLOGY WUXI Co.,Ltd. |
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Granted publication date: 20140409 |
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