CN103560573A - Bidirectional converter rectification system of wind energy and luminous energy storage system - Google Patents
Bidirectional converter rectification system of wind energy and luminous energy storage system Download PDFInfo
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- CN103560573A CN103560573A CN201310576646.XA CN201310576646A CN103560573A CN 103560573 A CN103560573 A CN 103560573A CN 201310576646 A CN201310576646 A CN 201310576646A CN 103560573 A CN103560573 A CN 103560573A
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Abstract
A bidirectional converter rectification system of a wind energy and luminous energy storage system is characterized by comprising a power control module, a battery management module, a three-phase power grid module, a bidirectional converter module, a bidirectional converter control module and an energy storage battery model. The bidirectional converter rectification system has the advantages that control over unit power factors of grid side sine-wave currents is facilitated, the double-ring cascade control strategy of controlling a target outer ring and a grid side current inner ring is adopted, a feedforward decoupling control algorithm is adopted for the current inner ring, an energy storage battery is charged, and meanwhile rectification power factors are controlled.
Description
(1) technical field:
The present invention relates to power electronics science and technology and Current Control field, especially a kind of two way convertor commutation system of wind-light storage system.
(2) background technology:
Continuous exhaustion along with fossil energy, people are more and more important to the development and utilization of the clean reproducible energies such as wind energy, solar energy, China has abundant wind resource and solar energy resources, but wind power generation and solar power generation amount are affected by the factors such as weather, season, there is intermittence and fluctuation, may cause energy output deficiency when electricity needs peak, and energy output is superfluous when electricity needs low ebb.Set up wind-light storage transmission power station, by energy storage, can realize the complementation of wind power generation and solar power generation, and at power peak regulation, stablize electrical network, utilize regenerative resource important role.
Wind-light storage transmission electric generating station system consists of wind generator system, solar power system and energy-storage system, by power control system, is received dispatching of power netwoks and the power of each system in wind-light storage transmission electricity generation system is controlled.Therefore wherein energy-storage system is comprised of energy-storage battery and two way convertor, invents a kind ofly two way convertor commutation system to be deposited electric energy in energy-storage battery stably the crisis of resource that promotes scene to wait the utilization of new forms of energy and to solve the mankind is had to long-range great meaning.
When in wind-light storage transmission power station, two way convertor is operated in rectification state, object is that energy-storage battery is charged, therefore the rectification control strategy of two way convertor will design according to the charge characteristic of energy-storage battery, it is satisfied that to the charging of the different charging modes of energy-storage battery, " energy-storage battery is expensive, discharge and recharge number of times limited, with having a great impact in capacity and useful life that suitable mode is charged for battery, and energy-storage battery changes more responsive for the electric current and voltage in charging process, so rectification control strategy and the control performance of two way convertor have vital effect "
(3) summary of the invention:
The two way convertor commutation system that the object of the present invention is to provide a kind of wind-light storage system, it can overcome the deficiencies in the prior art, can meet carrying out fast, reduce the charging to battery loss under the different charging modes of energy-storage battery when rectification state.He can reduce the loss of charging process to battery as much as possible, accelerates charge efficiency, and simple in structure, easy to maintenance, can be on a large scale for all kinds of energy-storage systems.
Technical scheme of the present invention: a kind of two way convertor commutation system of wind-light storage system, it is characterized in that comprising power control module, battery management module, three phase network module, two way convertor module, two way convertor control module and energy-storage battery module, the input of wherein said two way convertor control module connects the output of PC and battery management module, and its output is connected with the input of two way convertor module; Described energy-storage battery module receives the output signal of two way convertor module, and its output connects the input of battery management module; The voltage and current signal of the three phase network of the input receiving belt wind-light storage power station power control module of described two way convertor module.
Operation principle of the present invention: as shown in Figure 2, when two way convertor is operated in rectification state, there are three kinds of patterns, be constant current charge constant voltage charge and the charging of limit power, according to every kind of charging modes, adopt the two close-loop control scheme of different tandems, no matter adopt which kind of tandem scheme, wherein interior ring all adopts current loop control, therefore the performance of electric current loop directly has influence on the control effect of outer shroud, thus the control performance while having influence on rectification state.
Wherein Current Control Technology has the Direct Current Control and indirect current control technology " it is by the control of amplitude and the phase place of AC voltage that indirect current is controlled; realize the control to electric current; need to not use current sensor to detect to form closed-loop control at AC; have advantages of and control simply without current feedback; but the system that indirect current is controlled is responsive to system parameter variations; and dynamic response is slow, is therefore not suitable for applying to the occasion that dynamic response requirement is high.
Direct Current Control is by the closed-loop control to current on line side, improved the dynamic and static characteristic of current on line side, can obtain the high-quality current response of net side, and control system disturbance is to external world no longer responsive, improved the robustness of control system " and the charging process of energy-storage battery is very responsive to voltage, electric current; need the control system that electric current dynamic response is high, so native system adopts Direct Current Control.
Direct Current Control has electric current dynamic response and the stability of a system fast, Direct Current has multiple control modes, as hysteresis current is controlled, " advantage of hysteresis current control is to have dynamic response faster for fixed switching frequency control and space vector Current Control etc., by the hysteresis band of setting, determined the dynamic deviation of current tracking, its shortcoming is that switching frequency is unfixing, the harmonic ratio producing in switching process is more serious, this designing requirement to net side filter inductance is higher, and loss and the stress of switching tube when turning on and off increases, therefore in large-power occasions application " therefore this control mode is not suitable for, native system adopts the Direct Current Control mode of fixed switching frequency.
Described wind-light storage generated output control module (see figure 1) limits the also charged state of decision systems to the control information of Bidirectional variable-flow controller input power to the rectified power of current transformer.
Described battery management module (see figure 1) is responsible for collection and is calculated the voltage of current energy-storage battery charging, electric current, temperature etc., and the SOC of energy-storage battery is done to estimate, control the voltage and current of current energy-storage battery charging, to two way convertor, react the now receptible charging voltage of energy-storage battery and size of current, and being operated in constant voltage charge stage or constant current charge stage, wind-light storage transmission power station sends electrical network and allows the maximum power information of rectification to two way convertor.
Described three phase network module (see figure 1) determines the state of battery in charging the latter electric discharge, and for the present invention, we suppose that electrical network is in the sufficient state of energy, and energy-storage battery is in charged state, and we carry out rectification control to this.
Described two way convertor module (see figure 1) determines now to carry out constant voltage charge or constant current charge according to battery management module feedack; Power Limitation when current transformer determines rectification according to power control system simultaneously.
Described energy-storage battery module (see figure 1) when electrical network during in charged state for store electrical energy, and to battery management module, feed back the information of current charged state.
Superiority of the present invention is: (1) the design's control structure is coherent, and is conducive to realize the unity power factor control of net side sine-wave current; (2) adopted control target outer shroud, the dicyclo cascade control strategy of ring in current on line side, wherein current inner loop adopts feed forward decoupling control algorithm, has realized when energy-storage battery is charged the control to rectified power factor.
(4) accompanying drawing explanation:
Fig. 1 is the overall structure block diagram of the two way convertor commutation system of the related a kind of wind-light storage system of the present invention.
Fig. 2 is that the constant voltage charge system of the two way convertor commutation system of the related a kind of wind-light storage system of the present invention is controlled operation principle block diagram.
(5) embodiment:
Embodiment: a kind of two way convertor commutation system (see figure 1) of wind-light storage system, it is characterized in that comprising power control module, battery management module, three phase network module, two way convertor module, two way convertor control module and energy-storage battery module, the input of wherein said two way convertor control module connects the output of PC and battery management module, and its output is connected with the input of two way convertor module; Described energy-storage battery module receives the output signal of two way convertor module, and its output connects the input of battery management module; The voltage and current signal of the three phase network of the input receiving belt wind-light storage power station power control module of described two way convertor module.
Claims (1)
1. the two way convertor commutation system of a wind-light storage system, it is characterized in that comprising power control module, battery management module, three phase network module, two way convertor module, two way convertor control module and energy-storage battery module, the input of wherein said two way convertor control module connects the output of PC and battery management module, and its output is connected with the input of two way convertor module; Described energy-storage battery module receives the output signal of two way convertor module, and its output connects the input of battery management module; The voltage and current signal of the three phase network of the input receiving belt wind-light storage power station power control module of described two way convertor module.
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| CN201310576646.XA CN103560573A (en) | 2013-11-18 | 2013-11-18 | Bidirectional converter rectification system of wind energy and luminous energy storage system |
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| CN201310576646.XA CN103560573A (en) | 2013-11-18 | 2013-11-18 | Bidirectional converter rectification system of wind energy and luminous energy storage system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832835A (en) * | 2018-08-06 | 2018-11-16 | 科赫姆电气（常州）有限公司 | A kind of novel bidirectional energy-storage inverter |
| CN109217429A (en) * | 2018-10-31 | 2019-01-15 | 西门子工厂自动化工程有限公司 | Method and apparatus for charge and discharge control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2013179722A (en) * | 2010-06-30 | 2013-09-09 | Sanyo Electric Co Ltd | Energy management system |
| CN203261043U (en) * | 2013-04-12 | 2013-10-30 | 广西科普仕能源有限公司 | Battery energy storage system |
-
2013
- 2013-11-18 CN CN201310576646.XA patent/CN103560573A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013179722A (en) * | 2010-06-30 | 2013-09-09 | Sanyo Electric Co Ltd | Energy management system |
| CN203261043U (en) * | 2013-04-12 | 2013-10-30 | 广西科普仕能源有限公司 | Battery energy storage system |
Non-Patent Citations (1)
| Title |
|---|
| 孙建华: "风光储输发电站中双向变流控制策略设计", 《中国优秀硕士学位论文全文库》, 31 December 2011 (2011-12-31), pages 26 - 40 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832835A (en) * | 2018-08-06 | 2018-11-16 | 科赫姆电气（常州）有限公司 | A kind of novel bidirectional energy-storage inverter |
| CN109217429A (en) * | 2018-10-31 | 2019-01-15 | 西门子工厂自动化工程有限公司 | Method and apparatus for charge and discharge control |
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Application publication date: 20140205 |