CN1893214A - Low-voltage photovotaic parallel-in control device - Google Patents
Low-voltage photovotaic parallel-in control device Download PDFInfo
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- CN1893214A CN1893214A CN 200510046806 CN200510046806A CN1893214A CN 1893214 A CN1893214 A CN 1893214A CN 200510046806 CN200510046806 CN 200510046806 CN 200510046806 A CN200510046806 A CN 200510046806A CN 1893214 A CN1893214 A CN 1893214A
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Abstract
Issues to be solved in the invention are that problem of detached island effect is solved by deployment of electric power currently; but as decentralized renewable energy resources are put into use largely, using traditional comm. and deployment of electric power cannot discover and solve the problem in time. Main points of the light-volt control device in low voltage for incorporating in power network are: the control device includes multifunctional monitor for measuring electric energy, solid switch for incorporating in power network, standard comm. interface, and controller for incorporating in power network. Through serial interface, controller is connected to the monitor and comm. interface, as well as connected to automatic switch for incorporating in power network through control cable. Features are: quick response for detached island effect; changing operating procedure into renewable machine program so as to improve automatic logic and issue of safety.
Description
Technical field
The present invention relates to a kind of by electric company to the low pressure photovoltaic generation be incorporated into the power networks management control device, especially can realize island effect is carried out the monitoring of real-time dual signal isolated island and realizes the long-range/auto-parallel control device of Combinational Logic Control on the spot.
Background technology
At home, because the grid-connected shortage policy support of low pressure in the past, therefore the standard, technology and the product that do not have moulding, just on some demonstrative projects, combined application modes such as the interchange control cubicle of employing decentralized, DC control cabinet, inverter cause control limit fuzzy, matter is high at a low price, poor reliability, as demonstrative project still can, actually can't carry out business promotion and use.At present, " regenerative resource method " issued and has been about to and implemented, under the guiding of policy, the grid-connected market of domestic low pressure started already, had all proposed urgent requirement for the low-pressure grid-connection control device of drawing a clear control limit, formation administrative standard and technical standard, exploitation higher reliability and fail safe as early as possible.
Because also prematurity of the grid-connected technical standard of low pressure at present, common low-pressure grid-connection user also is unfamiliar with operational procedure, occurs operate miss and work careless omission easily; Or because of being lacking in experience, when handling abnormal conditions, can not judge timely and accurately and take measures, might cause serious consequence, gently then equipment or electrical network are caused and damage or loss, heavy then may lead to the personal safety accident.
When the low pressure photovoltaic generating system is incorporated into the power networks, electrical network is barrier accident or when having a power failure maintenance and outage for some reason, the low pressure grid-connected photovoltaic system separates with civil power if fail in time to detect power down mode, will form a self contained power supply isolated island by low pressure grid-connected photovoltaic system and load on every side.Along with increasing of low pressure grid-connected photovoltaic system and other distributing and network source, the probability that island effect takes place also can be more and more higher, and developing faster in regenerative resource in recent years, countries and regions have caused people's extensive attention.Island effect all will impact power distribution system equipment and end user device, and easily electric shock accidents take place.China is in electric power system, " island effect " is to pass through communication modes, power scheduling by electric power system solves this problem, a large amount of uses along with the distributing regenerative resource, only adopting the traditional communication of electric power system to add the electric power scheduling obviously can not in time find and address this problem fully, form easily potential safety hazard, and must adopt the combined strategy of monitoring in real time and on the spot/Long-distance Control, can realize system safety and stably move.
Summary of the invention
The present invention can carry out the integration apparatus of standardization metering, monitoring, operation and management as electric company, focus on this key link of control that is incorporated into the power networks, no matter and network users use the equipment such as inverter, charge controller of what specification, can both be under the regulation and control of this standard set-up, insert electrical network, effectively move or cut off.The present invention forecloses equipment such as inverter, direct current protecting, charge controller, and their merger network users are freely selected for use.
For electric company at the monitoring of the real-time dual signal isolated island of the grid-connected realization of low pressure and on the spot/combination of Long-distance Control, the present invention except standard communication interface that power communication is provided, possess real-time remote monitoring (comprising the isolated island monitoring) and the remote control function, also has controlled function on the spot, and with the logical combination of remote control function, to guarantee the safety and the reliability service of low pressure photovoltaic parallel in system.
The object of the present invention is achieved like this: the electronic device that will possess be incorporated into the power networks automatic control and metering, monitoring function is installed in the metal cabinet, mainly by multifunctional electric energy measure monitor device, net-connected controller, solid-state be incorporated into the power networks switch and standard communication interface totally four parts form.Except that net-connected controller, other three parts belong to mature technology, and off-the-shelf is arranged on the market.
The present invention compares with the prior art scheme, owing to realized the combination of real-time monitoring and on the spot/Long-distance Control, therefore can react rapidly to abnormal running monitor signals such as island effects, in time controls the switch motion of being incorporated into the power networks.Simultaneously, the operational procedure that low pressure is grid-connected becomes renewable machine program, stops the uncertain factor of manual operation with perfect automatic logic, has solved grid-connected safety problem effectively from technical standpoint.
Description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 is a kind of principle schematic of the present invention.
Fig. 2 is the structural representation of net-connected controller among the present invention.
Fig. 3 is a control program FB(flow block) in the net-connected controller among the present invention.
Fig. 4 is the principle schematic of dual signal isolated island monitoring in real time among the present invention.
Embodiment
Referring to Fig. 1, it is made up of four main portions, i.e. electric energy metrical monitor, net-connected controller, auto-parallel switch and standard communication interface.Specify as follows:
The electric energy metrical monitor: voltage, electric current, phase place and frequency by CT, PT gather low voltage electric network and photovoltaic generating system, link to each other with net-connected controller by serial line interface, give net-connected controller with the signal that collects.
Net-connected controller: link to each other with standard communication interface with the energy monitor device by serial line interface, be connected with the auto-parallel switch by control cable.
Net-connected controller can be gathered the various monitor signals that the energy monitor device produces, and carry out corresponding logical operation in inside, produce corresponding isolated island monitoring logical signal and real time execution logical signal in inside, after isolated island monitoring logical signal and real time execution logical signal pass through certain logical operation again, generate real time execution parameter bag and output control signal, real time execution parameter bag can send to power scheduling machine or communication equipment by communication interface, the output control signal is then directly given the auto-parallel switch, produce action by the auto-parallel switch, photovoltaic generating system is cut off or cuts electrical network.Net-connected controller can also receive the remote scheduling instruction that arrives by communication interface, and carries out the control corresponding operation.
Standard communication interface: be can compatible (at least two kinds) multiple dispatch interface equipment, link to each other with power scheduling machine or communication equipment with net-connected controller by serial line interface.
The auto-parallel switch: constituted by solid state switch, link to each other by control cable with net-connected controller, when the output control signal that net-connected controller produces was delivered to the auto-parallel switch by control cable, the auto-parallel switch produced corresponding actions.
Power module: be mainly energy monitor device, net-connected controller and communication interface direct current supply is provided, input 220VAC, output 5～30VDC.
Control cabinet: metallic makes, and degree of protection need reach IP65.
Referring to Fig. 2, it adopts embedded design technology (ARM+Linux).Form by two main portions, i.e. ARM controller and solid-state relay.Specify as follows:
The ARM controller can adopt ARM 7 or ARM 9 serial controllers, and embedded system adopts the Linux embedded system.The ARM controller is by serial ports and the communication of electric energy metrical monitor, gather the energy monitor data, after calculate by program ARM controller inside, the output control signal is given solid-state relay, and the output contact capacity enough drives the control signal of auto-parallel switch to the auto-parallel switch behind solid-state relay.
The control program workflow is seen accompanying drawing 3: the control program FB(flow block).
Referring to Fig. 4, the logical signal of dual signal isolated island monitoring in real time is to produce through after the logical operation in the inside of net-connected controller, net-connected controller is gathered real-time voltage, electric current, phase place and the frequency of low voltage electric network and photovoltaic generating system earlier by the electric energy metrical monitor, pass through comparing, judged whether that low pressure, mistake low frequency and phase place sharply changed with stored parameters; Produce the output of isolated island monitoring logical signal then in the following manner: at first will cross low-voltage signal, cross low-frequency signals and carry out the logical computing, afterwards operation result is carried out the logical "or" computing with the rapid variable signal of phase place again, produce the output of isolated island monitoring logical signal at last.
Claims (2)
1, a kind of low-voltage photovotaic parallel-in control device, it comprises multifunctional electric energy measure monitor device, solid-state switch and the standard communication interface of being incorporated into the power networks, it is characterized in that: it also has net-connected controller, net-connected controller links to each other with standard communication interface with the energy monitor device by serial line interface, is connected with the auto-parallel switch by control cable.
2, according to the described low-voltage photovotaic parallel-in control device of claim 1, it is characterized in that: said net-connected controller mainly is made up of ARM controller and solid-state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046806 CN1893214A (en) | 2005-07-05 | 2005-07-05 | Low-voltage photovotaic parallel-in control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046806 CN1893214A (en) | 2005-07-05 | 2005-07-05 | Low-voltage photovotaic parallel-in control device |
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| CN1893214A true CN1893214A (en) | 2007-01-10 |
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| CN 200510046806 Pending CN1893214A (en) | 2005-07-05 | 2005-07-05 | Low-voltage photovotaic parallel-in control device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257209B (en) * | 2008-01-10 | 2010-06-16 | 清华大学深圳研究生院 | Islet operation detecting method of photovoltaic parallel network generating system |
| CN101834431A (en) * | 2010-05-21 | 2010-09-15 | 深圳市科陆电子科技股份有限公司 | Method for preventing grid-connected island effect of distributed power source |
| CN102097964A (en) * | 2011-03-14 | 2011-06-15 | 山东鲁冶瑞宝电气自动化有限公司 | Photovoltaic grid-connected inverter |
| CN102169342A (en) * | 2011-05-13 | 2011-08-31 | 吉林省电力有限公司电力科学研究院 | Distribution network coordination control system and control method taking account of distributed power |
| CN102355002A (en) * | 2011-08-28 | 2012-02-15 | 大连中隆新能源科技有限公司 | Device and system for protecting islanding effect in isolated-type grid-connected power generation |
| CN101719677B (en) * | 2009-12-10 | 2012-04-18 | 西东控制集团（沈阳）有限公司 | Control unit for zero counter current network integrating control device |
| CN102611159A (en) * | 2012-03-06 | 2012-07-25 | 武汉佳业联创科技有限公司 | Power supply measuring management system for charging piles |
| CN102684554A (en) * | 2011-03-15 | 2012-09-19 | 沈阳西东控制技术有限公司 | Method for detecting system transient characteristic waves for shared network control on photovoltaic micro-grid |
| CN102983595A (en) * | 2012-12-17 | 2013-03-20 | 江苏元中直流微电网有限公司 | Interface device for distributed power generation system and power grid and control method of interface device |
| CN103314497A (en) * | 2011-01-12 | 2013-09-18 | 波音公司 | Smart microgrid reconfigurable AC interface |
| WO2016074571A1 (en) * | 2014-11-11 | 2016-05-19 | 国家电网公司 | Distributive photovoltaic generating grid-connected intelligent black box and application thereof |
-
2005
- 2005-07-05 CN CN 200510046806 patent/CN1893214A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257209B (en) * | 2008-01-10 | 2010-06-16 | 清华大学深圳研究生院 | Islet operation detecting method of photovoltaic parallel network generating system |
| CN101719677B (en) * | 2009-12-10 | 2012-04-18 | 西东控制集团（沈阳）有限公司 | Control unit for zero counter current network integrating control device |
| CN101834431A (en) * | 2010-05-21 | 2010-09-15 | 深圳市科陆电子科技股份有限公司 | Method for preventing grid-connected island effect of distributed power source |
| CN103314497A (en) * | 2011-01-12 | 2013-09-18 | 波音公司 | Smart microgrid reconfigurable AC interface |
| CN103314497B (en) * | 2011-01-12 | 2017-03-15 | 波音公司 | Smart microgrid reconfigurable AC interface |
| CN102097964A (en) * | 2011-03-14 | 2011-06-15 | 山东鲁冶瑞宝电气自动化有限公司 | Photovoltaic grid-connected inverter |
| 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 |
| CN102684554A (en) * | 2011-03-15 | 2012-09-19 | 沈阳西东控制技术有限公司 | Method for detecting system transient characteristic waves for shared network control on photovoltaic micro-grid |
| CN102169342A (en) * | 2011-05-13 | 2011-08-31 | 吉林省电力有限公司电力科学研究院 | Distribution network coordination control system and control method taking account of distributed power |
| CN102169342B (en) * | 2011-05-13 | 2014-09-17 | 吉林省电力有限公司电力科学研究院 | Distribution network coordination control system and control method taking account of distributed power |
| CN102355002A (en) * | 2011-08-28 | 2012-02-15 | 大连中隆新能源科技有限公司 | Device and system for protecting islanding effect in isolated-type grid-connected power generation |
| CN102611159A (en) * | 2012-03-06 | 2012-07-25 | 武汉佳业联创科技有限公司 | Power supply measuring management system for charging piles |
| CN102983595A (en) * | 2012-12-17 | 2013-03-20 | 江苏元中直流微电网有限公司 | Interface device for distributed power generation system and power grid and control method of interface device |
| CN102983595B (en) * | 2012-12-17 | 2015-07-01 | 江苏元中直流微电网有限公司 | Interface device for distributed power generation system and power grid and control method of interface device |
| WO2016074571A1 (en) * | 2014-11-11 | 2016-05-19 | 国家电网公司 | Distributive photovoltaic generating grid-connected intelligent black box and application thereof |
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