CN105262089A - System for improving voltage fluctuation and flicker caused by distributed power generation - Google Patents
System for improving voltage fluctuation and flicker caused by distributed power generation Download PDFInfo
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- CN105262089A CN105262089A CN201510858523.4A CN201510858523A CN105262089A CN 105262089 A CN105262089 A CN 105262089A CN 201510858523 A CN201510858523 A CN 201510858523A CN 105262089 A CN105262089 A CN 105262089A
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- voltage fluctuation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention particularly relates to a system for improving voltage fluctuation and flicker caused by distributed power generation. The system comprises a distributed power generating system, a load, a power grid and a current exchanging device connected with the distributed power generating system, the load and the power grid, and the current exchanging device is connected with a control system; the current exchanging device comprises a rectifier circuit and an inverter circuit which are electrically connected to play the roles of rectification and inversion; the control system controls the current exchanging device and monitors both the internal operation state of the current exchanging device and the connection state of the distributed power generating system, the load and the power grid with the current exchanging device. According to the system, a boosting transformer is added on the basis of distributed power generation, the voltage is increased, the resistance is reduced, and therefore occurrence of voltage fluctuation and flicker is improved; meanwhile, a reactive power compensation device is installed, occurrence of voltage fluctuation and flicker is further improved, and therefore voltage fluctuation and flicker caused by original distributed power generation are greatly reduced.
Description
Technical field
The present invention relates to technical field of power systems, relate to a kind of system improving the voltage fluctuation and flicker that distributed power generation causes in particular.
Technical background
Due to rapid development of economy; the energy and environmental problem become increasingly conspicuous; the mankind must coordinate economic development, relation between using energy source and environmental protection, and propose opinion and the strategy of sustainable development, distributed power generation progressively grows up just in this context.
There is fluctuation due to its power output in distributed power generation, causes voltage ripple of power network and flickering, have bad impact to the quality of power supply of local electrical network.The trend distribution of electrical network determines the voltage's distribiuting situation of electrical network, so the change of load consumption and power supply injecting power can cause the voltage fluctuation of each bus nodes of electrical network in electrical network.Flickering is the subjective vision of people to the lamplight brightness change caused by voltage fluctuation, only has flickering value to reach certain numerical value and just can cause flicker problem.
Therefore, be necessary to propose a kind of technical scheme, improve the method for the voltage fluctuation and flicker that distributed power generation causes, become a kind of new technical need.
Summary of the invention
(1) technical problem that will solve
For above shortcoming, the present invention proposes a kind of technical scheme, improves the method for the voltage fluctuation and flicker that distributed power generation causes, thus provides a kind of system improving the voltage fluctuation and flicker that distributed power generation causes.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides described a kind of system improving the voltage fluctuation and flicker that distributed power generation causes, comprise distributed generation system, load, electrical network and connect the exchanging electrical current device of distributed generation system, load and electrical network, described exchanging electrical current device is connected with control system;
Wherein, described exchanging electrical current device comprises rectification circuit and inverter circuit, and described rectification circuit is electrically connected with inverter circuit, plays the effect of rectification and inversion;
Wherein, described control system controls exchanging electrical current device and monitoring current switch internal operation state, monitors the connection status of distributed generation system, load and electrical network and exchanging electrical current device simultaneously.
Further, be provided with step-up transformer between described distributed generation system and exchanging electrical current device, described step-up transformer is placed in the output of distributed generation system and the input of exchanging electrical current device.
Further, the bus between described distributed generation system and exchanging electrical current device is provided with reactive power compensation device, and described reactive power compensation device is silent oscillation reactive power compensation device.
Further, the centralized single electric power system that described distributed generation system is is feature with large-sized unit, bulk power grid, high voltage.
Further, described load is user terminal, comprises inductive load, capacitive load and resistive load, also includes switch and earth leakage protective device simultaneously.
Further, described electrical network comprises the entirety of power transformation electric line composition in one's power, comprises power transformation, transmission of electricity, distribution three unit, conveying with distribute electric energy and change voltage.
Further, described exchanging electrical current device is Intelligent current switch, and device judges the mode of exchanging electrical current according to the flow direction of electric current, switches conversion rectification circuit and inverter circuit by intelligence.
Further, step-up transformer is high-frequency step-up transformer, DC boosting transformer or ac step-up transformer.
Beneficial effect of the present invention is:
The present invention improves voltage by adding step-up transformer on the basis of distributed power generation, reduce impedance, improve the generation of voltage fluctuation and flicker, installed reactive power compensation device simultaneously, further improve the generation of voltage fluctuation and flicker, add by two secondary devices and device the voltage fluctuation and flicker greatly reducing original distributed power generation and cause.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation improving the system of the voltage fluctuation and flicker that distributed power generation causes of the preferred embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment also with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
As shown in Figure 1, a kind of system improving the voltage fluctuation and flicker that distributed power generation causes, comprise distributed generation system, load, electrical network and connect the exchanging electrical current device of distributed generation system, load and electrical network, described exchanging electrical current device is connected with control system;
Wherein, described exchanging electrical current device comprises rectification circuit and inverter circuit, and described rectification circuit is electrically connected with inverter circuit, plays the effect of rectification and inversion, and AC conversion is direct current by rectification circuit, and DC conversion is alternating current by inverter circuit;
Wherein, described control system controls exchanging electrical current device and monitoring current switch internal operation state, monitor the connection status of distributed generation system, load and electrical network and exchanging electrical current device simultaneously, control system Real-Time Monitoring voltage peak and mean value, current peak and mean value and every Circuits System parameter.
Step-up transformer is provided with between described distributed generation system and exchanging electrical current device, described step-up transformer is placed in the output of distributed generation system and the input of exchanging electrical current device, step-up transformer is utilized to raise voltage, square being inversely proportional to of the percentage of the loss of voltage and electrical network rated voltage, therefore, improve supply power voltage and good effect is played to suppression voltage ripple of power network degree; Step-up transformer is high-frequency step-up transformer, DC boosting transformer or ac step-up transformer.
Bus between described distributed generation system and exchanging electrical current device is provided with reactive power compensation device, described reactive power compensation device is silent oscillation reactive power compensation device, and the voltage fluctuation that compensation arrangement causes high-power impact load, flickering and harmonic wave have good compensating action.
The centralized single electric power system that described distributed generation system is is feature with large-sized unit, bulk power grid, high voltage.
Described load is user terminal, comprises inductive load, capacitive load and resistive load, also includes switch and earth leakage protective device simultaneously, and described load comprises all electric terminals.
Described electrical network comprises the entirety of power transformation electric line composition in one's power, comprises power transformation, transmission of electricity, distribution three unit, conveying with distribute electric energy and change voltage.
Described exchanging electrical current device is Intelligent current switch, and device judges the mode of exchanging electrical current according to the flow direction of electric current, switches conversion rectification circuit and inverter circuit by intelligence.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (8)
1. one kind is improved the system of the voltage fluctuation and flicker that distributed power generation causes, it is characterized in that, comprise distributed generation system, load, electrical network and connect the exchanging electrical current device of distributed generation system, load and electrical network, described exchanging electrical current device is connected with control system;
Wherein, described exchanging electrical current device comprises rectification circuit and inverter circuit, and described rectification circuit is electrically connected with inverter circuit, plays the effect of rectification and inversion;
Wherein, described control system controls exchanging electrical current device and monitoring current switch internal operation state, monitors the connection status of distributed generation system, load and electrical network and exchanging electrical current device simultaneously.
2. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1, it is characterized in that: be provided with step-up transformer between described distributed generation system and exchanging electrical current device, described step-up transformer is placed in the output of distributed generation system and the input of exchanging electrical current device.
3. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1, it is characterized in that: the bus between described distributed generation system and exchanging electrical current device is provided with reactive power compensation device, described reactive power compensation device is silent oscillation reactive power compensation device.
4. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1, is characterized in that: the centralized single electric power system that described distributed generation system is is feature with large-sized unit, bulk power grid, high voltage.
5. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1; it is characterized in that: described load is user terminal; comprise inductive load, capacitive load and resistive load, also include switch and earth leakage protective device simultaneously.
6. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1, it is characterized in that: described electrical network comprise power transformation in one's power electric line composition entirety, comprise power transformation, transmission of electricity, distribution three unit, conveying is with distribution electric energy and change voltage.
7. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1, it is characterized in that: described exchanging electrical current device is Intelligent current switch, device judges the mode of exchanging electrical current according to the flow direction of electric current, switches conversion rectification circuit and inverter circuit by intelligence.
8. a kind of system improving the voltage fluctuation and flicker that distributed power generation causes according to claim 1, is characterized in that: step-up transformer is high-frequency step-up transformer, DC boosting transformer or ac step-up transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510858523.4A CN105262089A (en) | 2015-11-30 | 2015-11-30 | System for improving voltage fluctuation and flicker caused by distributed power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510858523.4A CN105262089A (en) | 2015-11-30 | 2015-11-30 | System for improving voltage fluctuation and flicker caused by distributed power generation |
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| CN105262089A true CN105262089A (en) | 2016-01-20 |
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| CN201510858523.4A Pending CN105262089A (en) | 2015-11-30 | 2015-11-30 | System for improving voltage fluctuation and flicker caused by distributed power generation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325460A (en) * | 2016-08-31 | 2017-01-11 | 浪潮电子信息产业股份有限公司 | Method for improving voltage fluctuation caused by resonance of RACK server |
| CN109038597A (en) * | 2018-08-17 | 2018-12-18 | 青海电研科技有限责任公司 | voltage fluctuation control method and its control device, computer readable storage medium |
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| WO2013164249A1 (en) * | 2012-05-04 | 2013-11-07 | Alstom Technology Ltd | Nonlinear control device for a dc/dc converter used for conveying hvdc current |
| CN104734179A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Ternary converter system based on distributed power generation system |
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2015
- 2015-11-30 CN CN201510858523.4A patent/CN105262089A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013164249A1 (en) * | 2012-05-04 | 2013-11-07 | Alstom Technology Ltd | Nonlinear control device for a dc/dc converter used for conveying hvdc current |
| CN104734179A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Ternary converter system based on distributed power generation system |
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| 王志新等: "海上风电柔性直流输电及变流器技术研究", 《电力学报》 * |
| 邹伟慧: "智能电网电压波动与闪变监测研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325460A (en) * | 2016-08-31 | 2017-01-11 | 浪潮电子信息产业股份有限公司 | Method for improving voltage fluctuation caused by resonance of RACK server |
| CN109038597A (en) * | 2018-08-17 | 2018-12-18 | 青海电研科技有限责任公司 | voltage fluctuation control method and its control device, computer readable storage medium |
| CN109038597B (en) * | 2018-08-17 | 2021-09-14 | 青海电研科技有限责任公司 | Voltage fluctuation control method, control device thereof, and computer-readable storage medium |
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Application publication date: 20160120 |