CN105680440A - Distributed direct current micro-grid control method and control system - Google Patents
Distributed direct current micro-grid control method and control system Download PDFInfo
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- CN105680440A CN105680440A CN201610229492.0A CN201610229492A CN105680440A CN 105680440 A CN105680440 A CN 105680440A CN 201610229492 A CN201610229492 A CN 201610229492A CN 105680440 A CN105680440 A CN 105680440A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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Abstract
The invention provides a distributed direct current micro-grid control method and control system. The method comprises the steps that: an output level voltage of an electric energy input module capable of inputting electric energy to a direct current bus is set; the output level voltage is compared with a voltage value of the direct current bus at present, and if the voltage value of the direct current bus at present is lower than the e output level voltage of the electric energy input module, then the electric energy input module inputs electric energy to the direct current bus with maximum output power; if the voltage value at present is higher than the output level voltage of the electric energy input module, then the electric energy input module is forbidden to input electric energy to the direct current bus; and if the voltage value at present is equal to the output level voltage of the electric energy input module, the output power of the electric energy input module is controlled to ensure that the voltage of the direct current bus at present is constant. According to divided output level voltages, preferential and differential utilization of electric energy is realized, local control is facilitated, and the control method and control system are especially suitable for distributed direct current micro-grid control in application occasions inconvenient for power station construction.
Description
Technical field
The present invention relates to the control method of a kind of direct-current grid and control system, particularly relate to a kind of distributed DC grid control method suitable in power supply field and control system.
Background technology
Direct-current grid is that various power supply units (photovoltaic, wind-powered electricity generation, energy storage, public electric wire net etc.) are connected into a system by the form with dc bus, and user only needs to add a kind of electrical equipment can be convenient to use the electric energy of micro-capacitance sensor.
The independent micro-grid system of dc bus, as shown in Figure 1, produce supply link (including various power generation facility (such as generating equipment or electrical network) and energy storage device (such as accumulator)) including the electric energy being connected with dc bus respectively, also include the supply module and the load that are connected with dc bus respectively. Electric energy produces supply link generation electric energy and exports dc bus, and dc bus gives each load by each functional module supply of electrical energy. In prior art, also including monitoring and administrative center, power generation facility and energy storage device that electric energy produces supply link are managed concentratedly and are monitored.
The current DC micro-electric network control method central controlled method of many employings, the method needs the equipment construction of micro-capacitance sensor comparatively to concentrate, and is not suitable for the application scenario (remote seat in the plane, such as airport) that some power plant constructions are inconvenient.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of distributed DC grid control method that can be applicable to the inconvenient application scenario of some power plant constructions and control system.
The technical solution used in the present invention is as follows: a kind of distributed DC grid control method, and its concrete control method is: arrange the respective output level voltage of n electric energy input module that can input electric energy to dc bus; By the output level voltage of each electric energy input module compared with the magnitude of voltage on current dc bus, if the magnitude of voltage of current dc bus is lower than the output level voltage of certain electric energy input module, then this electric energy input module inputs electric energy with its peak power that can export to dc bus; If the magnitude of voltage of current dc bus is higher than the output level voltage of certain electric energy input module, then forbid that this electric energy input module inputs electric energy to dc bus; If the magnitude of voltage of current dc bus is equal to the output level voltage of certain electric energy input module, then control the output of this electric energy input module so that it is ensure the voltage constant on current dc bus; Described n is the natural number be more than or equal to 2.
When there being n electric energy input module, can arranging m output level voltage, m is the natural number be more than or equal to 1, and m is less than or equal to n. That is, the corresponding output level voltage arranged of each electric energy output module possible is different, it is likely to certain several electric energy output module each corresponding output level voltage arranged identical, but each can input the electric energy input module of electric energy to dc bus and have the output level voltage of its correspondence. Compared with the voltage that output level voltage corresponding to each electric energy input module is current with on dc bus all in real time: if the voltage on current dc bus is higher than certain output level voltage, then limiting the electric energy that this electric energy input module corresponding to output level voltage exports to dc bus, as forbidden, corresponding electric energy input module inputs electric energy to dc bus; If the voltage on current dc bus is lower than certain output level voltage, then enables this electric energy input module corresponding to output level voltage do one's best and namely input electric energy with its peak power output exported to dc bus; If the voltage on current dc bus is equal to certain output level voltage, then control the output of this electric energy input module corresponding to output level voltage, it is that its output is in a dynamic range, it is ensured that currently the voltage on dc bus is dynamically constant.
According to the output level voltage divided, respectively the output of each electric energy input module is controlled, electric energy carries out preferential differentiation utilization, and convenient this locality controls simultaneously, and the distributed DC micro-capacitance sensor being particularly suitable for the inconvenient application scenario of some power plant constructions controls.
Further, described output level voltage is the output level voltage range comprising range of error; By the output level voltage range of each electric energy input module compared with the magnitude of voltage on current dc bus, if the magnitude of voltage of current dc bus is lower than the output level voltage error lower limit of certain electric energy input module, then this electric energy input module inputs electric energy with its peak power that can export to dc bus; If the magnitude of voltage of current dc bus is higher than the output level voltage error upper limit of certain electric energy input module, then forbid that this electric energy input module inputs electric energy to dc bus; If the magnitude of voltage of current dc bus belongs within the scope of the output level voltage error of certain electric energy input module, then control the output of this electric energy input module so that it is ensure the voltage constant on current dc bus; Described n is the natural number be more than or equal to 2.
Further, described output level voltage division principle includes: the output level voltage of regenerative resource electric energy input module (such as solar energy-electric energy input module, wind energy electric energy input module, tide energy electric energy input module and geothermal energy electric energy input module etc.) is higher than the output level voltage of non-renewable energy resources electric energy input module (such as electrical network electric energy input module and energy storage (such as accumulator) electric energy input module).
Further, described output level voltage division principle includes: electrical network accesses the output level voltage of electric energy input module and accesses the output level voltage of electric energy input module higher than energy storage.
Further, described method also includes: each electric energy input module each realizes the control of the setting to output level voltage and output in this locality. Each electric energy input module is at a local corresponding electric energy o controller, this electric energy o controller is arranged its output level voltage, this electric energy o controller Real-time Collection DC bus-bar voltage judges compared with its output level voltage, thus controlling the output of the electric energy that its corresponding electric energy input module inputs to dc bus. Local control replaces long-distance centralized control, and current speed is higher, and stability is higher.
Further, described method also includes: for non-renewable energy resources electric energy input module, electric energy timesharing can flow in or out dc bus, thus realizing the electric discharge to non-renewable energy resources electric energy input module and energy storage.
Control system based on above-mentioned distributed DC grid control method, it is characterised in that: include,
Output level voltage arranges module, arranges the output level voltage of each electric energy input module that can input electric energy to dc bus;
DC bus-bar voltage collection module, is used for gathering DC bus-bar voltage;
Voltage ratio relatively and judge module, for the output level voltage of each electric energy input module and the current DC bus-bar voltage gathered are compared, and according to the comparative result determination methods set, it is judged that need the control action to the execution of each electric energy input module;
Power output control module, is controlled according to the output that each electric energy input module is inputted electric energy to dc bus by control action judged result.
Further, each electric energy input module is at a local corresponding power output controller, and this power output controller includes respective,
Output level voltage arranges module, arranges the output level voltage of its electric energy input module that can input electric energy to dc bus;
DC bus-bar voltage collection module, is used for gathering DC bus-bar voltage;
Voltage ratio relatively and judge module, for its output level voltage and the current DC bus-bar voltage gathered are compared, and according to the comparative result determination methods set, it is judged that need the control action to the execution of this electric energy input module;
Power output control module, is controlled according to the output that this electric energy input module is inputted electric energy to dc bus by control action judged result.
Compared with prior art, the invention has the beneficial effects as follows:
1, according to the output level voltage divided, respectively the output of each electric energy input module is controlled, electric energy carries out preferential differentiation utilization, and convenient this locality controls simultaneously, and the distributed DC micro-capacitance sensor being particularly suitable for the inconvenient application scenario of some power plant constructions controls;
2, local control replaces long-distance centralized control, and current speed is higher, and stability is higher.
Accompanying drawing explanation
Fig. 1 is the principle schematic of a direct-current grid wherein embodiment in prior art.
Fig. 2 is the electric energy input module control principle schematic diagram of a present invention wherein embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Any feature disclosed in this specification (include summary and accompanying drawing), unless specifically stated otherwise, all can by other equivalences or there is the alternative features of similar purpose replaced. That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Specific embodiment 1
A kind of distributed DC grid control method, its concrete control method is: arrange the respective output level voltage of n electric energy input module that can input electric energy to dc bus; By the output level voltage of each electric energy input module compared with the magnitude of voltage on current dc bus, if the magnitude of voltage of current dc bus is lower than the output level voltage of certain electric energy input module, then this electric energy input module inputs electric energy with its peak power that can export to dc bus; If the magnitude of voltage of current dc bus is higher than the output level voltage of certain electric energy input module, then forbid that this electric energy input module inputs electric energy to dc bus; If the magnitude of voltage of current dc bus is equal to the output level voltage of certain electric energy input module, then control the output of this electric energy input module so that it is ensure the voltage constant on current dc bus; Described n is the natural number be more than or equal to 2.
Based on the control system of above-mentioned distributed DC grid control method, including,
Output level voltage arranges module, arranges the output level voltage of each electric energy input module that can input electric energy to dc bus;
DC bus-bar voltage collection module, is used for gathering DC bus-bar voltage;
Voltage ratio relatively and judge module, for the output level voltage of each electric energy input module and the current DC bus-bar voltage gathered are compared, and according to the comparative result determination methods set, it is judged that need the control action to the execution of each electric energy input module;
Power output control module, is controlled according to the output that each electric energy input module is inputted electric energy to dc bus by control action judged result.
Specific embodiment 2
On the basis of specific embodiment 1, described output level voltage is the output level voltage range comprising range of error; By the output level voltage range of each electric energy input module compared with the magnitude of voltage on current dc bus, if the magnitude of voltage of current dc bus is lower than the output level voltage error lower limit of certain electric energy input module, then this electric energy input module inputs electric energy with its peak power that can export to dc bus; If the magnitude of voltage of current dc bus is higher than the output level voltage error upper limit of certain electric energy input module, then forbid that this electric energy input module inputs electric energy to dc bus; If the magnitude of voltage of current dc bus belongs within the scope of the output level voltage error of certain electric energy input module, then control the output of this electric energy input module so that it is ensure the voltage constant on current dc bus; Described n is the natural number be more than or equal to 2.
Specific embodiment 3
On the basis of specific embodiment 1 or 2, described output level voltage division principle includes: the output level voltage of regenerative resource electric energy input module is higher than the output level voltage of non-renewable energy resources electric energy input module; Electrical network accesses the output level voltage of electric energy input module and accesses the output level voltage of electric energy input module higher than energy storage.
Such as: current electric energy input module includes solar energy and accesses electric energy input module, wind energy access input module, electrical network access electric energy input module and accumulator access electric energy input module; Then divide solar energy and access an electric energy input module output level voltage a(such as 620V corresponding to wind energy access electric energy input module), electrical network accesses the corresponding output level voltage b(such as 610V of electric energy input module), accumulator accesses the corresponding output level voltage c(such as 600V of electric energy input module), and a > b > c, then 4 corresponding 3 output level voltages of electric energy input module. If the magnitude of voltage of current dc bus is 610V, the most lower limit of the output level voltage 620V(of electric energy input module or the range of error lower than 620V is accessed owing to accessing electric energy input module and wind energy lower than solar energy), therefore solar energy accesses electric energy input module and wind energy accesses electric energy input module and inputs electric energy with its peak power that can export to dc bus; Owing to 610V accesses the output level voltage 600V(of electric energy input module or higher than the most upper limit of 600V range of error higher than accumulator), therefore forbid that accumulator accesses electric energy input module and inputs electric energy to dc bus; Owing to 610V equal to the output level voltage 610V(of electrical network access electric energy input module or belongs in 610V voltage gradation range of error), therefore control electrical network and access the output of electric energy input module so that it is ensure the voltage constant on current dc bus.
Specific embodiment 4
On the basis of one of specific embodiment 1 to 3, described method also includes: each electric energy input module each realizes the control of the setting to output level voltage and output in this locality.
Each electric energy input module is at a local corresponding power output controller, and this power output controller includes respective,
Output level voltage arranges module, arranges the output level voltage of its electric energy input module that can input electric energy to dc bus;
DC bus-bar voltage collection module, is used for gathering DC bus-bar voltage;
Voltage ratio relatively and judge module, for its output level voltage and the current DC bus-bar voltage gathered are compared, and according to the comparative result determination methods set, it is judged that need the control action to the execution of this electric energy input module;
Power output control module, is controlled according to the output that this electric energy input module is inputted electric energy to dc bus by control action judged result.
Specific embodiment 5
On the basis of one of specific embodiment 1 to 4, described method also includes: for non-renewable energy resources electric energy input module, electric energy timesharing can flow in or out dc bus, thus realizing the electric discharge to non-renewable energy resources electric energy input module and energy storage.
Claims (8)
1. a distributed DC grid control method, its concrete control method is: arrange the respective output level voltage of n electric energy input module that can input electric energy to dc bus; By the output level voltage of each electric energy input module compared with the magnitude of voltage on current dc bus, if the magnitude of voltage of current dc bus is lower than the output level voltage of certain electric energy input module, then this electric energy input module inputs electric energy with its peak power that can export to dc bus; If the magnitude of voltage of current dc bus is higher than the output level voltage of certain electric energy input module, then forbid that this electric energy input module inputs electric energy to dc bus; If the magnitude of voltage of current dc bus is equal to the output level voltage of certain electric energy input module, then control the output of this electric energy input module so that it is ensure the voltage constant on current dc bus; Described n is the natural number be more than or equal to 2.
2. distributed DC grid control method according to claim 1, described output level voltage is the output level voltage range comprising range of error; By the output level voltage range of each electric energy input module compared with the magnitude of voltage on current dc bus, if the magnitude of voltage of current dc bus is lower than the output level voltage error lower limit of certain electric energy input module, then this electric energy input module inputs electric energy with its peak power that can export to dc bus; If the magnitude of voltage of current dc bus is higher than the output level voltage error upper limit of certain electric energy input module, then forbid that this electric energy input module inputs electric energy to dc bus; If the magnitude of voltage of current dc bus belongs within the scope of the output level voltage error of certain electric energy input module, then control the output of this electric energy input module so that it is ensure the voltage constant on current dc bus; Described n is the natural number be more than or equal to 2.
3. distributed DC grid control method according to claim 1 and 2, described output level voltage division principle includes: the output level voltage of regenerative resource electric energy input module is higher than the output level voltage of non-renewable energy resources electric energy input module.
4. distributed DC grid control method according to claim 3, described output level voltage division principle includes: electrical network accesses the output level voltage of electric energy input module and accesses the output level voltage of electric energy input module higher than energy storage.
5. distributed DC grid control method according to claim 1 and 2, described method also includes: each electric energy input module each realizes the control of the setting to output level voltage and output in this locality.
6. distributed DC grid control method according to claim 1 and 2, described method also includes: for non-renewable energy resources electric energy input module, electric energy timesharing can flow in or out dc bus, thus realizing the electric discharge to non-renewable energy resources electric energy input module and energy storage.
7. based on the control system of the distributed DC grid control method described in claim 1, it is characterised in that: include,
Output level voltage arranges module, arranges the output level voltage of each electric energy input module that can input electric energy to dc bus;
DC bus-bar voltage collection module, is used for gathering DC bus-bar voltage;
Voltage ratio relatively and judge module, for the output level voltage of each electric energy input module and the current DC bus-bar voltage gathered are compared, and according to the comparative result determination methods set, it is judged that need the control action to the execution of each electric energy input module;
Power output control module, is controlled according to the output that each electric energy input module is inputted electric energy to dc bus by control action judged result.
8. distributed DC micro grid control system according to claim 7, it is characterised in that: each electric energy input module is at a local corresponding power output controller, and this power output controller includes respective,
Output level voltage arranges module, arranges the output level voltage of its electric energy input module that can input electric energy to dc bus;
DC bus-bar voltage collection module, is used for gathering DC bus-bar voltage;
Voltage ratio relatively and judge module, for its output level voltage and the current DC bus-bar voltage gathered are compared, and according to the comparative result determination methods set, it is judged that need the control action to the execution of this electric energy input module;
Power output control module, is controlled according to the output that this electric energy input module is inputted electric energy to dc bus by control action judged result.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437566A (en) * | 2011-10-17 | 2012-05-02 | 中国电力科学研究院 | Direct-current-bus-voltage-based adaptive coordination control method for distributed power supply |
| CN102593819A (en) * | 2012-03-13 | 2012-07-18 | 江苏元中直流微电网有限公司 | DC micro power grid system |
| CN103219723A (en) * | 2013-04-16 | 2013-07-24 | 浙江工业大学 | Direct-current micro-grid energy coordination control method based on intelligent multiple agents |
| CN103269068A (en) * | 2013-04-27 | 2013-08-28 | 嘉善明世电力科技有限公司 | Photoelectric direct-current micro-grid power source device and control method |
| WO2014089567A2 (en) * | 2012-12-07 | 2014-06-12 | Nuevo Power, Inc. | Remote access, control, and management of a power micro grid |
| CN104779607A (en) * | 2015-04-27 | 2015-07-15 | 重庆大学 | Distributed coordination control method and system for direct-current micro-grid |
-
2016
- 2016-04-14 CN CN201610229492.0A patent/CN105680440A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437566A (en) * | 2011-10-17 | 2012-05-02 | 中国电力科学研究院 | Direct-current-bus-voltage-based adaptive coordination control method for distributed power supply |
| CN102593819A (en) * | 2012-03-13 | 2012-07-18 | 江苏元中直流微电网有限公司 | DC micro power grid system |
| WO2014089567A2 (en) * | 2012-12-07 | 2014-06-12 | Nuevo Power, Inc. | Remote access, control, and management of a power micro grid |
| CN103219723A (en) * | 2013-04-16 | 2013-07-24 | 浙江工业大学 | Direct-current micro-grid energy coordination control method based on intelligent multiple agents |
| CN103269068A (en) * | 2013-04-27 | 2013-08-28 | 嘉善明世电力科技有限公司 | Photoelectric direct-current micro-grid power source device and control method |
| CN104779607A (en) * | 2015-04-27 | 2015-07-15 | 重庆大学 | Distributed coordination control method and system for direct-current micro-grid |
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