CN105375483A - Source/network/storage/charge coordination management system for serving energy Internet and method - Google Patents

Source/network/storage/charge coordination management system for serving energy Internet and method Download PDF

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CN105375483A
CN105375483A CN201510943469.3A CN201510943469A CN105375483A CN 105375483 A CN105375483 A CN 105375483A CN 201510943469 A CN201510943469 A CN 201510943469A CN 105375483 A CN105375483 A CN 105375483A
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source
lotus
net
energy
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CN105375483B (en
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黄学良
季振亚
孙厚涛
李军
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Southeast University
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    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract

The invention discloses a source/network/storage/charge coordination management system for serving energy Internet and a method. The source/network/storage/charge coordination management system for serving the energy Internet comprises a source/network/storage/charge intelligent management system and a source/network/storage/charge Internet communication system; the internet communication system utilizes a communication network to realize collection and monitoring of system metadata and provides communication support to a control order of the intelligent control system; and the intelligent control system is designed to have a three-layer structure comprising a need layer, a state layer and a control layer. The balance of the need and the supply, maintaining of electric energy quality and management of need side can be achieved through configuring the source/network/storage/ charge comprehensive coordination control and optimization management. The invention provides a set of highly autonomous and fast respond energy management strategy to the energy interconnection and realizes the high efficiency utilization of the distributed power supplies under the architecture of the energy network.

Description

A kind of is source/net/storage/lotus coordinated management system and the method for energy Internet service
Technical field
The present invention relates to energy internet arena and distributed electrical source domain, be specifically related to a kind of source/net/storage/lotus coordinated management system and the method that are applied to energy the Internet.
Background technology
The fast development of distributed power source, communication and control technology brings the rise of the research field such as intelligent grid, active distribution network, source/net/storage/lotus coordination optimization is a kind of integrated management to distributed power source, electrical network, energy storage device and load, contain each link of electrical energy production, transmission, distribution and consumption, the level of dissolving of distribution type renewable energy can be improved further, and take into account system economy and fail safe.The energy the Internet of current rise is the developing direction that energy system is new, be intended to the interconnected circle of the energy making the complementation of horizontal multiple-energy-source body, longitudinal source/net/storage/lotus coordination and interaction, farthest utilize distribution type renewable energy, the Power supply and the large-scale energy that realize localization are interconnected.Source/net/storage/lotus coordination optimization management will be one of important technology realizing energy the Internet.
Under the background that energy the Internet develops rapidly, the importance of source/net/storage/lotus coordination optimization management day by day improves.The intra-zone that current research both domestic and external concentrates within the scope of micro-capacitance sensor is autonomous, the optimization of shorter mention and electrical network is coordinated, lay particular emphasis on the single or Partial coordination control of distributed power source, energy storage device, lack the research of source/net/storage/lotus as a tunable optimum management entirety, fail to play powerful support to economic load distribution.The control overflow that relevant coordinated management method or level are not strong, Master Control Center data volume is excessive, do not reach energy the Internet rank, or only do framework suggestion, managerial structure is loose, the aspects such as response speed during practical application, degree of flexibility all can be restricted.
Summary of the invention
For overcoming the deficiency to the interconnected and integrated management of distributed power source in energy the Internet, energy storage device, load and electric power system in above-mentioned background technology, object provided by the invention is to provide a kind of source/net/storage/lotus coordinated management system for energy Internet service and method.
For achieving the above object, the present invention is by the following technical solutions:
Be source/net/storage/lotus coordinated management system of energy Internet service, comprise source/net/storage/lotus intelligent management system and source/net/storage/lotus interconnected communication system;
Described source/net/storage/lotus intelligent management system comprises demand layer, state layer and key-course, wherein,
Described demand layer is used for accepting configuration information, and namely source/net/basic data of storage/lotus of collecting of source/net/storage/lotus interconnected communication system and the information of control objectives, at least comprise the exert oneself state P of distributed power source under MPPT maximum power point tracking dG_M, the maximum power P that power distribution network provides or accepts g_S_lim, P g_I_lim, the voltage on line side U gathered under grid-connected conditions *, the minimum and maximum state-of-charge SOC of battery energy storage system setting min, SOC max, user model is selected, and user agrees to minimum load demand P when accepting dsm l_min;
Described state layer is used for accepting operation information, namely utilizes the source/net/storage/lotus running state parameter of source/net/storage/lotus interconnected communication system Real-time Collection, at least comprises distributed power source actual power power P dG, the actual measurement voltage U of source/storage/lotus place bus, the instant SOC of battery energy storage system and the P that exerts oneself s, user's Real-time Load P l, electrical network provides power P g;
Described key-course comprises central controller, the information data provided by demand layer, state layer, carries out condition judgment and control according to the optimum management set in central controller; The associated control parameters of key-course at least comprises the adjustment of exerting oneself of distributed power source user model switches, energy-storage units discharge and recharge switches; The optimum management set in described central controller is: introduce the power adjustments factor the power partition coefficient K of energy-storage units and electrical network d, proportional controller coefficient lambda, expression formula is as follows:
K D = P S * / ( P S * + P G * ) = P S * / P * P * = P L - P D G + λ ( U * - U )
Wherein, U is source/storage/lotus place busbar voltage that state layer records; λ represents proportional controller coefficient; P *represent total power adjustments factor, be sum;
Described source/net/storage/lotus interconnected communication system comprises dispatch command, requirement command, controllable burden, load control unit, power electronic equipment, distributed power source, control unit, wherein, described dispatch command connects upper strata electrical network, and communication with dispatch instructions is transferred to demand layer and state layer; Described requirement command connects controllable burden, and by the requirement command information transmission of controllable burden to demand layer; The status information transmission of controllable burden is to state layer, and load control unit receives the information of key-course, and by information transmission to controllable burden; Power electronic equipment connects distributed power source, and by information transmission to state layer, the information of control unit accepting state layer and key-course, and by Signal transmissions to power electronic equipment.
A kind of is the source/net/storage/lotus coordinated management method of energy Internet service, utilizes source/net/storage/lotus interconnected communication system to transmit demand variable for source/net/storage/lotus intelligent management system, and the control overflow of feedback intelligent management system, specifically comprise:
The basic data such as controling parameters, state definition of source/net/storage/lotus and the information of control objectives is collected by demand layer;
By the running state parameter of state layer Real-time Collection source/net/storage/lotus;
Realize system power balance finally by key-course, general objective function representation is:
P DG+P S+P G＝P L
In formula, P dG, P s, P grepresent distributed power source respectively, exerting oneself of energy-storage units and electrical network; P lrepresent user's total load;
Exert oneself when customer charge is greater than distributed power source, system judges the state of energy-storage system, if instant SOC is less than the minimum value SOC of setting min, need be powered by grid side; By the electrical network P that collect the last with demand layer g_S_limand corresponding electricity price instruction, the routine pre-set according to user, economic dispatch operational mode are with P l_minrepresent the minimum load demand after user accepts dsm, i.e. the uncontrollable part of load, determine whether user cuts economic model and run.
Distributed power source is preferentially exerted oneself by the control of MPPT, when energy-storage units state-of-charge exceeds setting maximum SOC maxand the power adjustments factor when being greater than the maximum power of electrical network setting acceptance, key-course can determine distributed power source to exert oneself be set to:
P D G _ lim * = P L - P * + λ ( U * - U ) .
The invention has the beneficial effects as follows: the present invention is by setting up the communication network of the signals such as measurement, control, realize the real-time information collection between source/net/storage/lotus, and by data transmission intelligent control system, and provide communication support for the control command of intelligent management system.Compared with prior art, the present invention manages the coordination optimization of source/net/storage/lotus, consider the mass data of future source of energy the Internet, control system adopts three-decker to realize, flexible selective system control objectives can be required according to communication speed, operational capability and system responses, control effects is also more accurate, has dsm function, promotes the utilance of distributed power source further.
Accompanying drawing explanation
Fig. 1 is source/net/storage/lotus coordinated management system schematic diagram of the present invention;
Fig. 2 is workflow of the present invention example.
Embodiment
Below in conjunction with Figure of description, a kind of source/net/storage/lotus coordinated management system for energy Internet service and method are described further.
Be illustrated in figure 1 a kind of source/net/storage/lotus coordinated management system for energy Internet service of the present invention, in figure, interconnected between solid line indication equipment or device, dotted line represents the communication network of the signals such as measurement, control, communication network is utilized to realize collection and the monitoring of system metadata, and information channel is set up between source/storage/lotus, the control command for intelligent control system provides communication support.Comprise source/net/storage/lotus intelligent management system and source/net/storage/lotus interconnected communication system; Source/net/storage/lotus intelligent management system comprises demand layer, state layer and key-course, wherein,
Demand layer is used for accepting configuration information, and namely the information of source/net/storage/basic data such as lotus controling parameters, state definition of collecting of source/net/storage/lotus interconnected communication system and control objectives, at least comprises the exert oneself state P of distributed power source under MPPT maximum power point tracking dG_M, the maximum power P that power distribution network provides or accepts g_S_lim, P g_I_lim, system reference voltage U *, under the condition be connected to the grid, this value comes from the voltage on line side collection of demand layer; Other command informations that network operater or regulator issue also can collect at demand layer; Minimum and the maximum state-of-charge SOC of battery energy storage system setting min, SOC max, user model is selected, and user agrees to minimum load demand P when accepting dsm l_min, can battery be extended at this operated within range.
State layer is used for accepting operation information, namely utilizes the source/net/storage/lotus running state parameter of source/net/storage/lotus interconnected communication system Real-time Collection, at least comprises distributed power source actual power power P dG, the actual measurement voltage U of source/storage/lotus place bus, the instant SOC of battery energy storage system and the P that exerts oneself s, user's Real-time Load P l, electrical network provides power P g;
Key-course comprises central controller, the information data provided by demand layer, state layer, carries out condition judgment and control according to the optimum management set in central controller; The associated control parameters of key-course at least comprises the adjustment of exerting oneself of distributed power source user model switches, energy-storage units discharge and recharge switches; The optimum management set in described central controller is: introduce the power adjustments factor the power partition coefficient K of energy-storage units and electrical network d, proportional controller coefficient lambda, expression formula is as follows:
K D = P S * / ( P S * + P G * ) = P S * / P * P * = P L - P D G + λ ( U * - U )
Wherein, U is source/storage/lotus place busbar voltage that state layer records; λ represents proportional controller coefficient; P *represent total power adjustments factor, be sum;
Source/net/storage/lotus interconnected communication system comprises dispatch command, requirement command, controllable burden, load control unit, power electronic equipment, distributed power source, control unit, wherein, dispatch command connects upper strata electrical network, and communication with dispatch instructions is transferred to demand layer and state layer; Described requirement command connects controllable burden, and by the requirement command information transmission of controllable burden to demand layer; The status information transmission of controllable burden is to state layer, and load control unit receives the information of key-course, and by information transmission to controllable burden; Power electronic equipment connects distributed power source, and by information transmission to state layer, the information of control unit accepting state layer and key-course, and by Signal transmissions to power electronic equipment.
A kind of is the source/net/storage/lotus coordinated management method of energy Internet service, utilizes source/net/storage/lotus interconnected communication system to transmit demand variable for source/net/storage/lotus intelligent management system, and the control overflow of feedback intelligent management system, specifically comprise:
The basic data such as controling parameters, state definition of source/net/storage/lotus and the information of control objectives is collected by demand layer;
By the running state parameter of state layer Real-time Collection source/net/storage/lotus;
Realize system power balance finally by key-course, general objective function representation is:
P DG+P S+P G＝P L
In formula, P dG, P s, P grepresent distributed power source respectively, exerting oneself of energy-storage units and electrical network; P lrepresent user's total load.
In the present embodiment, exerting oneself preferentially for local self-supporting of default distributed power source, i.e. photovoltaic generating system, analyzes demand layer and state layer arranges the SOC state with the battery energy storage system received, and determines the charging operations to energy-storage units, if there is dump energy, access power distribution network.
Exert oneself when customer charge is greater than distributed power source, system judges the state of energy-storage system, if instant SOC is less than the minimum value SOC of setting min, need be powered by grid side.By the electrical network P that collect the last with demand layer g_S_limand corresponding electricity price instruction, according to routine, economic dispatch operational mode that user pre-sets, with P l_minrepresent the minimum load demand after user accepts dsm, i.e. the uncontrollable part of load, determine whether user cuts economic model and run.
Distributed power source is preferentially exerted oneself by the control of MPPT, when energy-storage units state-of-charge exceeds setting maximum SOC maxand the power adjustments factor when being greater than the maximum power of electrical network setting acceptance, key-course can determine distributed power source to exert oneself be set to:
P D G _ lim * = P L - P * + λ ( U * - U )
For realizing coordination optimization control objectives, the flow process criterion of key-course refers to Fig. 2:
(1) demand layer receives configuration information, comprising: the exert oneself state P of distributed power source under MPPT maximum power point tracking dG_M, the maximum power P that power distribution network provides or accepts g_S_lim, P g_I_lim, system reference voltage U *; Minimum and the maximum state-of-charge SOC of battery energy storage system setting min, SOC max; User model is selected, and user agrees to minimum load demand P when accepting dsm l_min;
(2) state layer receives state information, comprising: distributed power source actual power power P dG; The actual measurement voltage U of source/storage/lotus place bus, electrical network provides power P g; The instant SOC of battery energy storage system and the P that exerts oneself s, user's Real-time Load P l;
(3) first the central controller of key-course judges P l> P dGwhether set up,
If set up, then judge the state-of-charge SOC < SOC of battery energy storage system minwhether set up, set up, then P S * = 0 , Be false, then P S * = &lambda;P * ; The power that power distribution network provides P G _ S = P G * = P * - P G * , Judge P g_S>=P g_S_limwhether set up, set up, then continue to judge user's original loads demand P lD>=P lwhether set up, be, then continue to judge " whether user agrees to economical operation ", be, then in above-mentioned Rule of judgment, P g_S>=P g_S_lim, P lD>=P l, have one to be false in " whether user agrees to economical operation ", then
P l> P dGbe false, then judge SOC>=SOC maxwhether set up, be, then be false, then the power that power distribution network accepts judge P g_I>=P g_I_limwhether set up, be, then continue to judge P dG=P dG_Mwhether set up, be, then distributed power source running status switches, no, then the minimum value of distributed power source generated output wherein, C pfor proportional controller coefficient; P g_S>=P g_S_limbe false, then
In sum, by comprehensive coordination control and the optimum management of above energy the Internet Zhong Yuan/net/storage/lotus, realize the equilibrium of supply and demand at key-course, maintain the target such as the quality of power supply, dsm, realize distributing rationally of electric energy, reach the object of source/net/storage/lotus coordinated management.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. be source/net/storage/lotus coordinated management system of energy Internet service, it is characterized in that: comprise source/net/storage/lotus intelligent management system and source/net/storage/lotus interconnected communication system;
Described source/net/storage/lotus intelligent management system comprises demand layer, state layer and key-course, wherein,
Described demand layer is used for accepting configuration information, and namely source/net/basic data of storage/lotus of collecting of source/net/storage/lotus interconnected communication system and the information of control objectives, at least comprise the exert oneself state P of distributed power source under MPPT maximum power point tracking dG_M, the maximum power P that power distribution network provides or accepts g_S_lim, P g_I_lim, the voltage on line side U gathered under grid-connected conditions *, the minimum and maximum state-of-charge SOC of battery energy storage system setting min, SOC max, user model is selected, and user agrees to minimum load demand P when accepting dsm l_min;
Described state layer is used for accepting operation information, namely utilizes the source/net/storage/lotus running state parameter of source/net/storage/lotus interconnected communication system Real-time Collection, at least comprises distributed power source actual power power P dG, the actual measurement voltage U of source/storage/lotus place bus, the instant SOC of battery energy storage system and the P that exerts oneself s, user's Real-time Load P l, electrical network provides power P g;
Described key-course comprises central controller, the information data provided by demand layer, state layer, carries out condition judgment and control according to the optimum management set in central controller; The associated control parameters of key-course at least comprises the adjustment of exerting oneself of distributed power source user model switches, energy-storage units discharge and recharge switches; The optimum management set in described central controller is: introduce the power adjustments factor the power partition coefficient K of energy-storage units and electrical network d, proportional controller coefficient lambda, expression formula is as follows:
Wherein, U is source/storage/lotus place busbar voltage that state layer records; λ represents proportional controller coefficient; P *represent total power adjustments factor, be sum;
Described source/net/storage/lotus interconnected communication system comprises dispatch command, requirement command, controllable burden, load control unit, power electronic equipment, distributed power source, control unit, wherein, described dispatch command connects upper strata electrical network, and communication with dispatch instructions is transferred to demand layer and state layer; Described requirement command connects controllable burden, and by the requirement command information transmission of controllable burden to demand layer; The status information transmission of controllable burden is to state layer, and load control unit receives the information of key-course, and by information transmission to controllable burden; Power electronic equipment connects distributed power source, and by information transmission to state layer, the information of control unit accepting state layer and key-course, and by Signal transmissions to power electronic equipment.
2. one kind is the source/net/storage/lotus coordinated management method of energy Internet service, it is characterized in that: utilize source/net/storage/lotus interconnected communication system for source/net/storage/lotus intelligent management system transmission demand variable, and the control overflow of feedback intelligent management system, specifically comprise:
The basic data such as controling parameters, state definition of source/net/storage/lotus and the information of control objectives is collected by demand layer;
By the running state parameter of state layer Real-time Collection source/net/storage/lotus;
Realize system power balance finally by key-course, general objective function representation is:
P DG+P S+P G＝P L
In formula, P dG, P s, P grepresent distributed power source respectively, exerting oneself of energy-storage units and electrical network; P lrepresent user's total load;
3. be the source/net/storage/lotus coordinated management method of energy Internet service as claimed in claim 2, it is characterized in that: exert oneself when customer charge is greater than distributed power source, system judges the state of energy-storage system, if instant SOC is less than the minimum value SOC of setting min, need be powered by grid side; By the electrical network P that collect the last with demand layer g_S_limand corresponding electricity price instruction, the routine pre-set according to user, economic dispatch operational mode are with P l_minrepresent the minimum load demand after user accepts dsm, i.e. the uncontrollable part of load, determine whether user cuts economic model and run.
4. be the source/net/storage/lotus coordinated management method of energy Internet service as claimed in claim 2, it is characterized in that: distributed power source is preferentially exerted oneself by the control of MPPT, when energy-storage units state-of-charge exceeds setting maximum SOC maxand the power adjustments factor when being greater than the maximum power of electrical network setting acceptance, key-course can determine distributed power source to exert oneself be set to:
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