CN102969791A - Flexible load management system and method of power system based on bidirectional intelligent electric meter - Google Patents
Flexible load management system and method of power system based on bidirectional intelligent electric meter Download PDFInfo
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Abstract
The invention relates to a flexible load management system of a power system based on a bidirectional intelligent electric meter. The flexible load management system of the power system based on the bidirectional intelligent electric meter is characterized by comprising an intelligent electric meter connected with a power supply grid control system in parallel for controlling the electrical load in real time, and an intelligent load device connected with the intelligent electric meter and used for adjusting the own operating mode under control of the intelligent electric meter. Based on the system, the invention further provides a flexible load management method of the power system based on the bidirectional intelligent electric meter. Under the condition that a load power supply is not cut off, the load is quickly and precisely controlled, particularly, under the condition of emergency state of the power grid such as supply emergency of power, the load is quickly weakened, the receiving capacity of the load is quickly improved, and the overall balance between supply and demand of electric energy of the system is maintained, so that the electrical safety, comfort, reliability and economical efficiency are greatly improved.
Description
Technical field
The invention belongs to technical field of power systems, more specifically, relate to a kind of Power System Flexible load management system and method based on the Bidirectional intelligent ammeter.
Background technology
In traditional electric power system, that electric load always is considered is passive, the system parameters of rigidity, balance for keeping system power, in prior art document " considering a kind of novel low-frequency off-load implementation of load frequency rigidity feature ", mention, serious power shortage when occuring in system in automatic low frequency load shed-ding device (UFLS), disconnect rapidly certain load, make system reach the power-balance that frequency is higher than a certain permissible value, prevent the system frequency collapse.
In conventional electrical network, disconnecting load can only realize by the tripping operation mode.And in intelligent grid, intelligent electric meter has possessed the information bidirectional ability to communicate, this just might control end user's electricity consumption at electrical network collection control end fully flexibly, not only can reach the effect that is equal to tripping operation excision power load, and can when the daily operation of electrical network, optimize the load distribution, suppress the interference that the clean energy resource fluctuation causes, obviously improve the economical and robustness of electric power system.
Prior art document " a kind of Intelligent power grid management system " (Chinese patent application CN201110171830.7) has disclosed a kind of integrated management approach of intelligent grid, the method is that the regenerative resource such as built-in be based on photovoltaic generation and wind power generation and the common power supply of traditional electrical network are main in a certain zone, the miniature combustion engine generating is for replenishing, batteries to store energy is as adjusting device, and with electric power system and this regional distribution system, each building user's using electricity system carries out the intelligent miniature network system of integrated interconnected formation region class, improve the reliability of this block supply network, improve the intelligent degree of whole this regional power grid, this patent lays particular emphasis on statement intelligent micro-grid comprehensive management mode and structure, the definite information of not mentioned intelligent power.
No longer power system load is used as simple rigid demand in the prior art document " flexible load in the intelligent grid " (" demand Side Management " 2012 the 3rd phase the 10th page), but by directly interactive between electrical network and load, make electric load show flexibility, its main function mode is the regulation and control that realize take electricity price as lever load.This mode of operation is more single, lack to load the control ability, on control precision, speed, all can't satisfy system requirements.
A kind of simple, practical load management means have been set forth in the prior art document " the direct load control strategy in the demand response " (" electrical measurement and instrument " 2012 the 3rd phase the 59th page), the total load of a definite investigation scope is pressed the electricity consumption property sort, in the situation that does not affect the user power utilization satisfaction, all kinds of power loads are reconfigured (scheduling) in sequential, to reduce total peak load.This method that electric load is classified control, avoided the peak hour and enable, self control precision is low, real-time is poor, can't tackle the emergency case of electric power system.
Summary of the invention
Goal of the invention of the present invention is: 1. how in the situation of not cutting off load power, realization is to quick, the accurately control of load, especially under the electrical network state of emergency, when lacking as supply of electric power is anxious, how to cut down fast load, or after system splitting, how improve rapidly the ability of dissolving of load at mains side; 2. how in the situation of not cutting off the power supply, by customer charge is carried out fast, accurately Flexible Control, exert oneself when occuring significantly to change at cleaner power sources, the ability to arrange jobs that changes power load is followed the tracks of to realize Fast synchronization, balance between the final overall supply and demand of keeping system electric energy, thereby in the keeping system economy, obviously improve the ability to arrange jobs to clean energy resource; 3. by the control of flexible intelligent load, utilize existing electric network composition, not changing the wiring of user's building internal power, not changing under the prerequisite of the indoor power wiring of user, realize electric Based Intelligent Control; 4. when stating in realization the control of flexible intelligent load, each intelligent electric simultaneously can compatible remote control pattern and economic operation model, also can contain the technology such as all kinds of energy storage, flexible transmission and little power grid control, and the system optimization control of realization maximum magnitude, significantly improve fail safe, comfortableness, reliability and the economy of electricity consumption.
To achieve these goals, the present invention takes following technical scheme to realize:
A kind of Power System Flexible load management system based on the Bidirectional intelligent ammeter is characterized in that, comprising:
Intelligent electric meter, interconnected with the power supply grid control system, be used in real time control power load;
The intelligence load equipment connects described intelligent electric meter, and regulates the operational mode of self under the control of described intelligent electric meter.
Preferably, described intelligent electric meter has upstream data contact end and downlink data contact end, and described upstream data contact end is used for receiving electricity price data and the control command from the power supply grid control system, and reports the power load real-time status; Described downlink data contact end is used for issuing described electricity price data and control command to intelligent load equipment, and reads the state information of intelligent load equipment.
Further preferably, the lower one deck intelligent electric meter of described downlink data contact end connection.
Further preferably, described intelligent load equipment is according to the operational mode under the described electricity price data selection normal condition, and regulates in real time operational mode according to the control command that issues.
Preferably, described intelligent electric meter and wide area network are interconnected, receive user's teleinstruction by wide area network, and control the operational mode of described intelligent load equipment according to described teleinstruction.
Preferably, described intelligent electric meter needs to receive in the situation of off-load the control command of removing flexible power load at power supply grid, and according to this instruction the power supply of the intelligent load equipment of a connected part is cut off or is adjusted to the operational mode of low power consumption.
Take said system as the basis, the present invention also provides a kind of Power System Flexible load management method based on the Bidirectional intelligent ammeter, it is characterized in that, comprising:
Step 1 receives electricity price data and control command by the intelligent electric meter that connects the power supply grid control system;
Step 2, according to described electricity price data and control command, the operational mode of the intelligent load equipment that in real time control is connected with described intelligent electric meter.
Preferably, according to the operational mode under the described electricity price data selection intelligence load equipment normal condition, and regulate in real time its operational mode according to described control command in the described step 2.
Preferably, need at power supply grid in the situation of off-load, receive the control command of removing flexible power load by described intelligent electric meter, and according to this instruction the power supply of the intelligent load equipment of a connected part is cut off or is adjusted to the operational mode of low power consumption.
Preferably, receive user's teleinstruction by described intelligent electric meter by wide area network, and control the operational mode of described intelligent load equipment according to described teleinstruction.
In sum, the present invention can be in the situation of not cutting off load power, realization is to quick, the accurately control of load, especially under the electrical network state of emergency, when lacking as supply of electric power is anxious, cut down fast load, improve rapidly the ability of dissolving of load, balance between the overall supply and demand of keeping system electric energy, and effectively realize electric Based Intelligent Control, can compatible remote control mode and economic operation model, and realize the system optimization control of maximum magnitude significantly improving fail safe, comfortableness, reliability and the economy of electricity consumption.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the system configuration schematic diagram of the embodiment of the invention.
Embodiment
In order to make those skilled in the art person understand better technical scheme of the present invention, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with embodiment and embodiment accompanying drawing.
Fig. 1 is the system configuration schematic diagram of the embodiment of the invention.G1 in the accompanying drawing 1, Gn are conventional power generation usage factories, and G2 is the clean energy resource power plant, such as wind energy turbine set.M1, M2 ... Mm is intelligent electric meter provided by the invention, L1, L2 ... Lm is intelligent load equipment.Intelligent electric meter M1, M2 ... Mm connects the grid control system of power supply grid, each intelligent load equipment L1, L2 ... Lm respectively with each self-corresponding intelligent electric meter M1, M2 ... Mm is connected, usually Every household has an ammeter in employing, i.e. M1, M2 ... every intelligent electric meter among the Mm connects and controls the whole intelligent load equipment that exists in the intelligent power family.C1, Cq then are respectively the electricity consumption client by wide area network access native system.Intelligent electric meter can also connect the intelligent electric meter of lower one deck, as be connected to the intelligent electric meter Mmk of lower one deck among Fig. 1 by intelligent electric meter Mm.
Power supply grid is by grid control system and each intelligent electric meter M1, M2 ... Mm is interconnected, thereby to intelligent electric meter M1, M2 ... Mm issues electricity price data and control command.Intelligent electric meter M1, M2 ... Mm is mutual according to grid control system, controls in real time user's power load, reaches optimization and the balance of total system power.Specifically, every intelligent electric meter has two data contact ends, upstream data contact end connects the power supply grid control system, receives the electricity price data assigned in real time and from the control command of electrical network, and the real-time status of user power utilization load is reported to grid control system; Downlink data contact end connects intelligent electric meter Mmk and intelligent load equipment L1, the L2 of lower one deck ... Lm; Described intelligent load equipment L1, L2 ... Lm can comprise user's intelligent appliance or intelligent battery group, and batteries can be regarded as a special class electric equipment, and its power load is negative value.Intelligent electric meter holds to read the state of these equipment by the downlink data contact, and intelligent electric meter Mmk and intelligent load equipment L1, the L2 that will be issued to described lower one deck from described electricity price data and the control command of electrical network ... Lm.Two contact ends can be distinguished networking, also can public same network.
Each intelligent load equipment L1, L2 ... Lm is except possessing conventional electric function, can also receive from intelligent electric meter M1, M2 ... electricity price data and the control command of Mm, thus the power supply grid control system can be carried out automation control to the operating state of intelligent load equipment by intelligent electric meter.Power supply grid enterprise can and the electricity consumption client between signature intelligent power agreement, or the user controls user's intelligent load equipment L1, L2 by buying the indirectly similar agreement of signature of intelligent electric appliance to allow power supply grid under emergency situations ... Lm.The intelligence load equipment is divided into a plurality of shelves, section, corresponding different power consumptions with the self-operating pattern.For example, Intelligent refrigeration equipment can be divided into cold by force, refrigeration, monitor, heating, 5 operational modes of Fast Heating, conventional operation is at refrigeration mode, under the state of emergency, when the electrical network electric power supply is superfluous, electrical network makes it to become cold by force by the running status of intelligent electric meter control Intelligent refrigeration equipment, to improve the consumption ability to electric energy, otherwise, when grid power lacked for meeting an urgent need, electrical network operated in monitored state by intelligent electric meter control Intelligent refrigeration equipment, and it is minimum that the power consumption ability is down to, until during the power system restoration normality, intelligent electric also returns to its initial launch pattern.
Under the normal condition, intelligent load equipment L1, L2 ... Lm is according to the received suitable operational mode of described electricity price data selection.In the electrical network normal course of operation, can pass through real-time monitoring electricity price data, impel intelligent load equipment L1, L2 ... Lm adjusts self power under the not obvious prerequisite that affects customer experience, thereby improves the economy of intelligent power.For example, when electrical network normally moved, because G2 place clean energy resource fan-out capability is unstable, for the keeping system power balance, grid control system can impel intelligent subscriber to make sync response by changing the electricity price data.Electricity price reduces when G2 place wind-force is sufficient, this moment intelligent electric meter M1, M2 ... Mm gives current electricity price transfer of data intelligent load equipment L1, the L2 of its lower end ... Lm, intelligence load equipment L1, L2 ... action when Lm can select, such as water heater Automatic-heating when electricity price is low, the automatic stopped heating in case electricity price raises, the intelligent battery group is automatic charging when electricity price is low also, automatically transfers generating state when high to electricity price to backspread.After the employee unit of arrival, oneself electric automobile is gone work again after intelligent electric meter access electric power system, its electric automobile can be earned the electric power price difference by its duration of work synchronously.
In emergency circumstances, the power supply grid control system can be passed through intelligent electric meter M1, M2 ... Mm assigns control command, intelligence load equipment L1, L2 ... Lm responds described control command, change its operational mode and corresponding power consumption, even can pass through intelligent electric meter M1, M2 ... Mm cuts off the power supply of a part of intelligent load equipment.Specifically:
Electrical network is when normal operation, and energy output and power consumption keep balance.When system broke down, the leading-out terminal short circuit occured in Gm, and the cut system power supply ability that causes of Gm obviously reduces, and cause thus system frequency, voltage drop, and Lm place voltage drop is the most obvious.At this moment, trip for fear of the low pressure off-load, grid control system is rapidly to intelligent electric meter M1, M2 ... Mm sends the control command of the flexible power load of excision, the 1st grade of flexible load excision of respectively intelligent electric meter M1, M2 etc. being controlled is such as the water heater stopped heating among intelligent load equipment L1, the L2, refrigerator are suspended refrigeration.Excise simultaneously whole flexible loads that Mm controls, outside being about to except electric consumption on lighting, keep among the intelligent load equipment Lm, other power loads all are in the cease operation state, such as the air-conditioning that will freeze as for holding state, if Mm links to each other with the intelligent electric meter Mmk of its lower one deck simultaneously, intelligent electric meter Mm transmits control command simultaneously to Mmk, and with the flexible load all suspend at Mmk place, the rest may be inferred.If the wind-force of G2 place wind field increases suddenly subsequently, grid control system can progressively recover the urgent flexible power load of Mm institute control area, the impact that during with the reduction load restoration system is caused.Behind pending fault eliminating or the system structure optimization, the system power supply ability is improved, and grid control system can recover all urgent flexible loads of Mm institute control range, and finally progressively removes the control of flexible load everywhere.
Native system allows intelligent electric meter M1, M2 simultaneously ... Mm and wide area network are interconnected, client C1, Cq can control equipment in the family automatically by wide area network, as: as described in intelligent electric meter M1, M2 ... Mm receives user's teleinstruction by wide area network, and control described intelligent load equipment L1, L2 according to described teleinstruction ... the operational mode of Lm, thereby the user can adjust to proper states with indoor temperature first before going home, to improve the service range of intelligent electric, this function has improved the fail safe of smart machine access network, avoids the mistake control.
Based on the Power System Flexible load management system of intelligent electric meter can compatible remote meter reading, a technology such as long-distance intelligent appliance control system and microgrid control, these functions are not done at this and are given unnecessary details.
In sum, the present invention can be in the situation of not cutting off load power, realization is to quick, the accurately control of load, especially under the electrical network state of emergency, when lacking as supply of electric power is anxious, cut down fast load, improve rapidly the ability of dissolving of load, balance between the overall supply and demand of keeping system electric energy, and effectively realize electric Based Intelligent Control, can compatible remote control mode and economic operation model, and realize the system optimization control of maximum magnitude significantly improving fail safe, comfortableness, reliability and the economy of electricity consumption.
The above only is the specific embodiment of the present invention, and the present invention can also be applied in the miscellaneous equipment; Size and quantity in more than describing all only are informative, and those skilled in the art can select suitable application size according to actual needs, and do not depart from the scope of the present invention.Protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claim was defined.
Claims (10)
1. the Power System Flexible load management system based on the Bidirectional intelligent ammeter is characterized in that, comprising:
Intelligent electric meter, interconnected with the power supply grid control system, be used in real time control power load;
The intelligence load equipment connects described intelligent electric meter, and regulates the operational mode of self under the control of described intelligent electric meter.
2. system according to claim 1, it is characterized in that, described intelligent electric meter has upstream data contact end and downlink data contact end, and described upstream data contact end is used for receiving electricity price data and the control command from the power supply grid control system, and reports the power load real-time status; Described downlink data contact end is used for issuing described electricity price data and control command to intelligent load equipment, and reads the state information of intelligent load equipment.
3. system according to claim 2 is characterized in that, described downlink data contact end connects lower one deck intelligent electric meter.
4. system according to claim 2 is characterized in that, described intelligent load equipment is according to the operational mode under the described electricity price data selection normal condition, and regulates in real time operational mode according to the control command that issues.
5. system according to claim 1 is characterized in that, described intelligent electric meter and wide area network are interconnected, receives user's teleinstruction by wide area network, and controls the operational mode of described intelligent load equipment according to described teleinstruction.
6. system according to claim 1, it is characterized in that, described intelligent electric meter needs to receive in the situation of off-load the control command of removing flexible power load at power supply grid, and according to this instruction the power supply of the intelligent load equipment of a connected part is cut off or is adjusted to the operational mode of low power consumption.
7. the Power System Flexible load management method based on the Bidirectional intelligent ammeter is characterized in that, comprising:
Step 1 receives electricity price data and control command by the intelligent electric meter that connects the power supply grid control system;
Step 2, according to described electricity price data and control command, the operational mode of the intelligent load equipment that in real time control is connected with described intelligent electric meter.
8. system according to claim 7 is characterized in that, according to the operational mode under the described electricity price data selection intelligence load equipment normal condition, and regulates in real time its operational mode according to described control command in the described step 2.
9. system according to claim 7, it is characterized in that, need at power supply grid in the situation of off-load, receive the control command of removing flexible power load by described intelligent electric meter, and according to this instruction the power supply of the intelligent load equipment of a connected part is cut off or is adjusted to the operational mode of low power consumption.
10. system according to claim 7 is characterized in that, receives user's teleinstruction by described intelligent electric meter by wide area network, and controls the operational mode of described intelligent load equipment according to described teleinstruction.
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| CN105760969A (en) * | 2016-03-18 | 2016-07-13 | 国网江苏省电力公司电力科学研究院 | Intelligent building electricity price response electricity utilization method based on controllable load active response |
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