CN112260286A - Method, system, equipment and medium for participating in electric power system control of electrolytic aluminum load - Google Patents

Method, system, equipment and medium for participating in electric power system control of electrolytic aluminum load Download PDF

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CN112260286A
CN112260286A CN202011080266.3A CN202011080266A CN112260286A CN 112260286 A CN112260286 A CN 112260286A CN 202011080266 A CN202011080266 A CN 202011080266A CN 112260286 A CN112260286 A CN 112260286A
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electrolytic aluminum
power
aluminum load
power system
load
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CN112260286B (en
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毛文博
李峰
徐鹏
潘玲玲
卜强生
李虎成
易文飞
王刚
王勇
王珂
汤必强
刘俊
石飞
王礼文
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention belongs to the field of power systems, and discloses a method, a system, equipment and a medium for controlling an electrolytic aluminum load to participate in a power system, which comprises the following steps: acquiring the regional regulation requirement of the power system; obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system; obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load; and superposing the base power of the electrolytic aluminum load and the adjustment power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and controlling the power of the electrolytic aluminum load based on the target power of the electrolytic aluminum load. The addition of the electrolytic aluminum load increases the power regulation capability of a regional power system, and the electrolytic aluminum load receives a unified scheduling instruction, so that the problems that the power control of the power system has limited regulation capability and the risks of overshoot, undershoot and regulation conflict are high are solved.

Description

Method, system, equipment and medium for participating in electric power system control of electrolytic aluminum load
Technical Field
The invention belongs to the field of power systems, and relates to a method, a system, equipment and a medium for controlling an electrolytic aluminum load to participate in a power system.
Background
Real-time power balance is a key for safe operation of a system, and in an alternating current power system with multiple interconnected regions, a method of regional control is often adopted to realize power balance of each region and simultaneously give consideration to power support of adjacent regions, so that power balance of the whole alternating current power system is realized. In order to maintain the power stability of the regional power system and reduce the exchange power deviation, the power system introduces an automatic power control (AGC) technology, and the power balance of the system is realized by adjusting the power of the generator set. The demand response technology is a means for various adjustable resources to participate in system regulation, and requires controllable resources to regulate power at a fixed time period or a certain time in advance by signing a contract. The dynamic balance of the power generation of the regional power grid is realized by adjusting the power of the power generation resources. As various non-generator resources begin to participate in system regulation, the regulation resources often have respective decision logic, control systems and management platforms, and mutual coordination is difficult to achieve, so that the active regulation pressure of the power system is gradually increased. Meanwhile, the AGC system presents the problem of control object limitation and control mode limitation. In the aspect of control objects, the power generation resource adjustment is mainly used, and the adjustment capability is limited; in the aspect of a control mode, non-unit resources generally need to be designed and derived into an equivalent unit model, control of other resources is achieved through a control mode similar to a unit, and control deviation exists.
At present, various demand response technologies are generally adopted to control adjustable resources to participate in system regulation, and power regulation is required to be carried out on controllable resources at a fixed time period or in advance for a certain time by signing a contract. However, various demand response technologies lack global coordination, generally take one or more control targets as a main point, set control logic for adjusting resources, and if conditions are met, the resources autonomously respond, so that the adjustment demands of the power system are difficult to obtain, and the action information of other adjustment resources of the power system cannot be obtained, so that the risk of overshoot, undershoot and adjustment conflicts is high.
In summary, the power control of the current power system has the problems of limited regulation capability and high risk of overshoot, undershoot and regulation conflict caused by the uncoordinated regulation of various resources.
Disclosure of Invention
The invention aims to overcome the defects of limited regulation capability of power system power control and high risk of overshoot, undershoot and regulation conflict caused by easiness in the prior art, and provides a method, a system, equipment and a medium for participating in power system control by electrolytic aluminum load.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the present invention, a method for participating in power system control of an electrolytic aluminum load comprises the following steps:
acquiring the regional regulation requirement of the power system;
obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system;
obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load;
and superposing the base power of the electrolytic aluminum load and the adjustment power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and controlling the power of the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
The method for controlling the power system by the participation of the electrolytic aluminum load is further improved in that:
the specific method for acquiring the regional regulation requirement of the power system comprises the following steps:
acquiring real-time frequency and real-time exchange power of an electric power system;
according to the real-time frequency and the real-time exchange power of the power system, combining the rated frequency and the exchange power plan of the power system to obtain the regional control deviation of the power system;
and obtaining the regional regulation requirement of the power system according to the regional control deviation of the power system.
The specific method for obtaining the area adjustment requirement of the power system according to the area control deviation of the power system comprises the following steps:
and respectively filtering and integrating the regional control deviation of the power system to obtain a filtering regional control deviation and a regional control deviation integral, superposing the filtering regional control deviation and the regional control deviation integral, and then taking a reverse value to obtain the regional regulation requirement of the power system.
The specific method for obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system comprises the following steps:
the preset sharing coefficient of the electrolytic aluminum load is superposed with the result of the total sharing coefficient of the current power system, and the total sharing coefficient of the power system is updated;
and obtaining the proportion of the preset share coefficient of the electrolytic aluminum load to the total share coefficient, and obtaining the adjusting power of the electrolytic aluminum load by multiplying the proportion by the regional adjusting requirement of the power system.
The specific method for obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load comprises the following steps:
acquiring the running state of the electrolytic aluminum load, wherein the running state comprises a residual adjusting time state, a yield delay state, a furnace temperature alarm state, a time period adjustable state, a standby triggering state and a maximum mileage state;
when the residual adjusting time state is that the residual adjusting time still exists, the yield lagging state is that the yield is not lagged, the furnace temperature alarming state is that the furnace temperature is normal, the time interval adjustable state is that the current time interval is in the adjustable time interval range of the electrolytic aluminum load, the standby triggering state is that the adjustment standby of the power system is insufficient, and the maximum mileage state is that the maximum adjusting mileage is not reached, the electrolytic aluminum load meets the calling condition; otherwise, the electrolytic aluminum load does not meet the calling condition;
when the electrolytic aluminum load does not meet the calling condition and the electrolytic aluminum load is being called, the electrolytic aluminum meets the power utilization condition for recovering the load; otherwise, the electrolytic aluminum does not meet the power utilization condition for recovering the load;
when the electrolytic aluminum load meets the calling condition and the electrolytic aluminum does not meet the load recovery electricity utilization condition, the control state of the electrolytic aluminum load is a calling-capable state, otherwise, the control state of the electrolytic aluminum load is a calling-incapable state.
The base point power of the electrolytic aluminum load is the real-time power of the electrolytic aluminum load.
Further comprising:
checking the regulating power of the electrolytic aluminum load, and updating the regulating power of the electrolytic aluminum load to be 0 when the regulating power of the electrolytic aluminum load is within the action dead zone of the electrolytic aluminum load.
In a second aspect of the present invention, a system for participating in the control of an electrical power system by an electrolytic aluminum load comprises:
the demand acquisition module is used for acquiring the regional regulation demand of the power system;
the adjusting power determining module is used for obtaining the adjusting power of the electrolytic aluminum load according to the regional adjusting requirement of the power system;
the base point power determining module is used for acquiring and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load; and
and the control module is used for superposing the base point power of the electrolytic aluminum load and the adjusting power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load and carrying out power control on the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
In a third aspect of the present invention, a computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for participating in the control of the power system by the electrolytic aluminum load when executing the computer program.
In a fourth aspect of the present invention, a computer-readable storage medium stores a computer program which, when executed by a processor, implements the steps of the above-described method of participating in the control of an electrical power system by an electrolytic aluminum load.
Compared with the prior art, the invention has the following beneficial effects:
compared with the existing AGC technology, the method for participating in the control of the power system by the electrolytic aluminum load increases the power regulation capability of the power system in a control area by adding the electrolytic aluminum load resource, and simultaneously obtains and determines the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load so as to ensure that the electrolytic aluminum load can be called and regulated at present, ensure that the power regulation requirement of the power system in the control area is responded while the production of industrial users is reduced or even not influenced, and take the benefits of the users and a power grid into consideration; meanwhile, compared with a demand response technology, the electrolytic aluminum load and other adjustable resources receive a unified scheduling instruction, the adjustment demand of the power system and the action information of other adjustable resources of the power system are effectively obtained, the incoordination of the adjustment of the load adjustment resources and the power generation resources can be avoided, and the risks of over-adjustment, under-adjustment and adjustment conflict are greatly reduced.
Furthermore, the method also comprises the step of checking the regulating power of the electrolytic aluminum load, and when the regulating power of the electrolytic aluminum load is in the action dead zone of the electrolytic aluminum load, the regulating power of the electrolytic aluminum load is updated to be 0. By checking the adjusting power of the electrolytic aluminum load, the adjusting power of the electrolytic aluminum load is ensured to be outside the action dead zone of the electrolytic aluminum load, and the electrolytic aluminum load is ensured to normally complete the adjusting requirement of the shared power system power.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention for implementing a method for participating in the control of an electric power system by an electrolytic aluminum load;
FIG. 2 is a block flow diagram of a method of participating in power system control of an electrolytic aluminum load in an embodiment of the present invention;
FIG. 3 is a block diagram of a process for obtaining a zone adjustment requirement of an electrical power system according to an embodiment of the present invention;
FIG. 4 is a block diagram showing the configuration of a system for participating in the control of an electric power system by an electrolytic aluminum load according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
First, related terms to which the present invention relates are introduced.
Automatic power control (AGC): a real-time control system calculates system adjustment requirements according to frequency deviation and exchange power deviation of a power system in a control area, and shares the requirements to a unit participating in adjustment, so that system frequency stability is maintained, and exchange power deviation of the control area is reduced.
Automatic Power Control (APC): a real-time control system is improved in an AGC system, and a control object of the system is expanded from a power generation resource to all power adjustable resources. The control target is to maintain the frequency stability of the system and reduce the exchange power deviation of the control area by adjusting the power of all resources participating in regulation and control, including power generation resources, controllable loads and energy storage resources.
Area Control Error (ACE): and calculating the control deviation of the control area according to the frequency deviation and the exchange power deviation of the control area, and calculating the real-time power regulation requirement of the control area according to the control deviation of the control area.
Area adjustment requirement (ARR): maintain local power balance, frequency stability, and meet the total regulation requirements of the power support requirements of neighboring regions.
Exchange power deviation: the control area power grid and the external area power grid are interconnected through a plurality of connecting lines, the connecting lines are channels for energy exchange between the control area power grid and the outside, a superior power grid generally sends out or receives a plan of power sending out or entering of the channels, the plan is an exchange power plan, during real-time operation, the power of high channels is added to the exchange power, and the deviation of the power of high channels and the exchange power plan is exchange power deviation.
High energy load: in the production link, the electricity charge is high in proportion to the production, and the equipment has large operation power.
Electrolytic aluminum loading: the load of modern industrial users who produce aluminium metal based on the electrochemical principle by connecting a large number of electrolysis cells in series.
A control area: regional power grids are usually divided by provincial administrative districts, and a control region mainly comprises power elements such as alternating current and direct current lines, generators, loads and transformers in the region. The ac/dc line interconnecting with the external power grid is called a tie line.
The invention is described in further detail below with reference to the accompanying drawings:
with the development of power system control, especially the development of power system power control, the inventor finds that the regulation potential mining of non-power generation resources is an important transformation of an automatic power generation control technology, so that the power system power control is transformed from a power generation tracking load mode to a power generation and load interaction mode, the power regulation resources of the power system are richer, the technical means are more flexible, and the capability and performance of the system for maintaining power dynamic balance are improved. Based on the method, the electrolytic aluminum load is brought into the regulation category of power control of the power system, wherein the electrolytic aluminum load is used as a load capable of controlling active power regulation through voltage regulation, and has good potential of responding to power regulation requirements of the power system, so that the regulation capacity of the power control of the power system is greatly improved.
Referring to fig. 1, an implementation principle of the method for participating in the control of the power system by the electrolytic aluminum load according to the present invention is shown, specifically, by obtaining the real-time frequency of the power system in the control area and counting the real-time exchange power of the power system in the control area; calculating to obtain an area control deviation ACE and an area regulation requirement ARR of the power system in the control area; judging the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load and the system state of the power system in the control area; carrying out uniform adjustment quantity sharing on the unit participating in ARR sharing and the electrolytic aluminum load, and calculating the adjustment power of the electrolytic aluminum load; and superposing the adjusting power of the electrolytic aluminum load by taking the real-time power of the electrolytic aluminum load as the base point power, finally calculating to obtain the target power of the electrolytic aluminum load through checking the adjusting power of the electrolytic aluminum load, and issuing the target power to the voltage control power controller of the electrolytic aluminum load to realize the tracking of the output power on the target power, finish the response to the active power adjusting requirement of the electric power system in the control area and further support the realization of the power control of the electric power system in the control area.
Referring to fig. 2, a method for participating in power system control of electrolytic aluminum load provided in an embodiment of the present invention is shown, which is performed based on the principle shown in fig. 1, and specifically includes the following steps.
S1: regional regulation requirements of the power system are obtained.
Specifically, the method can be obtained by controlling the deviation of the area of the power system, see fig. 3, and includes the following steps:
s101: and acquiring real-time frequency and real-time exchange power of the power system. Specifically, in this embodiment, the SCADA system is used to collect real-time frequency and real-time exchange power of the power system in the control area in real time, wherein the SCADA system is a computer-based automatic production process control and scheduling system, and can monitor and control the on-site operating equipment, and has the advantages of complete information, improved efficiency, correct control of the system operating state, accelerated decision making, and capability of helping to quickly diagnose the system fault state.
S102: and obtaining the regional control deviation of the power system according to the real-time frequency and the real-time exchange power of the power system and by combining the rated frequency and the exchange power plan of the power system.
Specifically, in this embodiment, by using the real-time frequency and the real-time exchange power acquired by the SCADA system, and further combining the rated frequency and the exchange power plan of the electric power system in the control area, the frequency deviation of the electric power system in the control area can be obtained after the difference between the real-time frequency and the rated frequency is corrected by the frequency deviation coefficient of the electric power system in the control area, and the exchange power deviation is represented as the difference between the real-time exchange power and the exchange power plan. The rated frequency and the exchange power plan are preset in advance and can be determined according to parameters of the power system in the control area.
After the frequency deviation and the exchange power deviation of the power system in the control area are obtained, the area control deviation of the power system in the control area can be obtained through the following formula:
ACEraw＝10*B*(f-f0)+(I-I0)
wherein, ACErawFor regional control deviation, B is the frequency deviation coefficient of the power system in the control region, unit MW/0.1Hz, f is the real-time frequency, f is0For nominal frequency, I for real-time exchange power, I0To exchange power plans.
S103: and obtaining the regional regulation requirement of the power system according to the regional control deviation of the power system. Specifically, in this embodiment, the area control deviation of the power system is filtered and integrated respectively to obtain a filtering area control deviation and an area control deviation integral, and the filtering area control deviation and the area control deviation integral are superposed to obtain an opposite value, so as to obtain the area adjustment requirement of the power system.
In this embodiment, a filtering method as shown in formula (1) is provided, where the filtering area control deviation is obtained by filtering the area control deviation:
Figure BDA0002718459410000091
wherein, ACEfiltThe deviation is controlled for the filtering area,aias attenuation coefficient, NhisFor the historical record number of the area control deviation, generally 15 historical sampling points are taken, i is the serial number of the historical area control deviation, ACEraw(i) I.e. the history zone control offset representing the sequence number i.
The integral of the area control deviation is obtained by integrating the area control deviation, and in the present embodiment, an integral method as shown in formula (2) is provided:
Figure BDA0002718459410000101
wherein, ACEIFor regional control deviation integration, ImaxFor integration limits, when the area control deviation integral exceeds [ -I ]max,Imax]When, take the boundary value, TAPCThe period of power control of the power system is set by a dispatching center and is generally set to 4s, k is the number of power control cycles of the power system at the current moment of the day, and zero clearing is carried out at 0 point every day.
After the filtering area control deviation and the area control deviation integral are obtained, in this embodiment, the area adjustment requirement P of the power system is obtained by the method shown in formula (3)ARR：
PARR＝-ACEfilt-ACEI (3)。
S2: and obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system.
Specifically, the total share coefficient of the power system is obtained by superposing the preset share coefficient of the electrolytic aluminum load on the preset share coefficients of other power regulating variables in the power system; in this embodiment, the total share coefficient F of the power system is updated by the method shown in the formula (4)total：
Ftotal＝Ftotal+Freg (4)
Wherein, FregIs a preset sharing coefficient of the load of the electrolytic aluminum.
Obtaining the proportion of the preset share coefficient of the electrolytic aluminum load to the total share coefficient, multiplying the proportion by the regional regulation requirement of the power system, and obtaining the regulation power of the electrolytic aluminum load by the method shown in the formula (5):
Preg＝PARR*Freg/Ftotal (5)。
in this embodiment, the adjustment power of the electrolytic aluminum load can also be obtained as follows: and obtaining the adjusting power of other adjustable power quantities in the power system, and subtracting the adjusting power of other adjustable power quantities from the regional adjusting requirement of the power system to obtain the adjusting power of the electrolytic aluminum load.
S3: obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, the base point power of the electrolytic aluminum load is obtained.
Specifically, in this embodiment, the operation state of the electrolytic aluminum load is set to include a remaining adjustment time state, a yield delay state, a furnace temperature alarm state, a time period adjustable state, a standby trigger state, and a maximum mileage state.
Wherein the state of the remaining conditioning time is used for indicating whether the electrolytic aluminum load has the remaining conditioning time. Specifically, the remaining adjustment time state is determined by the method shown in formula (6):
Figure BDA0002718459410000111
wherein, TonTime called for electrolytic aluminum load, IoncallCalling the status flag for the electrolytic aluminum load, 0 represents in a non-calling state, 1 represents in a calling state, InocalltmIn the state of the remaining adjustment time, 1 represents that the electrolytic aluminum load still has the remaining adjustment time, and 0 represents that the electrolytic aluminum load has no remaining adjustment time.
The yield lag state is used to indicate whether the electrolytic aluminum is in a yield lag state, and specifically, the yield lag state is determined by the method shown in equation (7):
Figure BDA0002718459410000112
wherein, IlessqIn the case of the delayed state of the yield of electrolytic aluminum, 0 means that the yield is not delayed, 1 means that the yield is delayed, and QcurAccumulated in the month of electrolytic aluminum at the present moment, QskAnd planning the monthly production at the current moment.
The furnace temperature alarm state is used for indicating whether the furnace temperature of the electrolytic cell for electrolyzing aluminum is normal, and specifically, the furnace temperature alarm state is determined by a method shown in an equation (8):
Figure BDA0002718459410000113
wherein, ItmpalmThe furnace temperature is in an alarm state, 0 represents that the furnace temperature is normal, 1 represents that the furnace temperature deviates from a normal operation range, and TPmnFor the lowest operating furnace temperature, TP, of the electrolytic cellcurFor real-time furnace temperature of the cell, TPmxThe highest operating furnace temperature of the electrolytic cell.
The time interval adjustable state is used for indicating whether the current time interval is within the adjustable time interval of the electrolytic aluminum load, and specifically, the time interval adjustable state is determined by the method shown in the formula (9):
Figure BDA0002718459410000121
wherein, IatimeFor the time interval adjustable state, 1 represents that the current time interval is within the adjustable time interval range of the electrolytic aluminum load, 0 represents that the current time interval is not within the adjustable time interval range of the electrolytic aluminum load, and TcurIs the current number of hours, SatimeThe set of adjustable periods agreed upon for the dispatch center and the users of the electrolytic aluminum may consist of a plurality of periods.
The standby triggering state is used to indicate whether the regulated standby of the power system is sufficient, and specifically, the standby triggering state is determined by a method shown in equation (10):
Figure BDA0002718459410000122
wherein, IrvalmFor the standby triggered state, 0 indicates that the regulated standby of the power system is sufficient, 1 indicates that the regulated standby of the power system is insufficient, and PrvupFor upper regulation standby of the power system, PrvupTriggering an upper standby threshold, P, for the load of electrolytic aluminumrvdnFor down-regulation of the power system, PrvdnThe triggered backup threshold is called for the electrolytic aluminum load.
Wherein, PrvupAnd PrvdnDetermined by the methods shown in formula (11) and formula (12), respectively:
Figure BDA0002718459410000123
Figure BDA0002718459410000124
wherein the content of the first and second substances,
Figure BDA0002718459410000125
Punmxto set the upper limit, PunmnFor adjusting the lower limit, P, of the unitunmxFor unit real-time power, IunonFor the unit in the on-off state, PuncapAs unit capacity, NunIs the total number of the machine groups participating in the regulation.
The maximum mileage state is used for indicating whether the adjustment power of the electrolytic aluminum load reaches the maximum adjustment mileage, and specifically, the maximum mileage state is determined by the method shown in formula (13):
Figure BDA0002718459410000131
wherein Q ismile(k)＝Qmile(k-1)+|Preg(k)|*TAPC，ImilemxIn the maximum mileage state, 1 means that the maximum adjustment mileage has not been reached, 0 means that the maximum adjustment mileage has been reached, and QmileZero clearing at 0 point every day for the current accumulated adjustment mileage, QmilemxMaximum adjustment mileage, P, agreed for dispatching center and electrolytic aluminum load userregThe power is adjusted for the electrolytic aluminum load.
Determining whether the electrolytic aluminum load meets a calling condition or not according to the actual running state of the electrolytic aluminum load by acquiring the running state of the electrolytic aluminum load, wherein when the residual adjusting time state is that residual adjusting time still exists, the yield delay state is that the yield is not delayed, the furnace temperature alarm state is that the furnace temperature is normal, the time interval adjustable state is that the current time interval is within the adjustable time interval range of the electrolytic aluminum load, the standby triggering state is that the adjustment standby of the power system is insufficient, and the maximum mileage state is that the maximum adjustment mileage is not reached, the electrolytic aluminum load meets the calling condition; otherwise, the electrolytic aluminum load does not meet the calling condition; i.e., as in formula (14):
Figure BDA0002718459410000132
wherein, UregonThe condition state is called for the electrolytic aluminum load, 1 is that the electrolytic aluminum load satisfies the calling condition, and 0 is that the electrolytic aluminum load does not satisfy the calling condition.
Then, based on the calling condition state of the electrolytic aluminum load and in combination with the current calling state of the electrolytic aluminum load, when the electrolytic aluminum load does not meet the calling condition and the electrolytic aluminum load is being called, the electrolytic aluminum load meets the recovery condition; otherwise, the electrolytic aluminum load does not meet the recovery condition; obtaining the recovery condition state of the electrolytic aluminum load; i.e., as in formula (15):
Urcvr＝[1-Ioncalltm*(1-Ilessq)*(1-Itmpalm)*Iatime*Irvalm*(1-Imilemx)]*Uoncall (15)
wherein, UrcvrIn the state of the recovery condition of the electrolytic aluminum load, 1 represents that the electrolytic aluminum satisfies the electrical condition for recovering the load, 0 represents that the electrolytic aluminum does not satisfy the electrical condition for recovering the load, UoncallThe state is called for the electrolytic aluminum load, 1 is called for the electrolytic aluminum load, 0 is electrolyticThe aluminum load is not being called.
The control state of the electrolytic aluminum load is determined according to the calling condition state of the electrolytic aluminum load, the calling state of the electrolytic aluminum load and the recovery condition state of the electrolytic aluminum load, and is specifically shown in table 1.
TABLE 1 control State table of electrolytic aluminum load
Uregon Uoncall Urcvr ST
0 0 0 0
0 0 1 3
0 1 0 4
0 1 1 4
1 0 0 1
1 0 1 3
1 1 0 2
1 1 1 4
Wherein ST is the control state of the electrolytic aluminum load, 0 represents the autonomous state, and the electrolytic aluminum load is completely controlled by a user according to the production requirement; 1 represents a 'waiting state', at the moment, the electrolytic aluminum load waits for control, but an adjusting instruction is not received; 2 indicates "calling state", at which time the electrolytic aluminum load receives a call command and is responding to power regulation; 3, a recovery state, wherein the electrolytic aluminum load recovers electricity, and the load power tracks the baseline load; 4 represents an "abnormal state", and the electrolytic aluminum load is not controlled until the state is returned to 0 to 3. Wherein the control state of the electrolytic aluminum load is a calling state comprising a 'waiting calling state' and a 'calling' state.
The base point electric power of the electrolytic aluminum load is obtained according to the control state of the electrolytic aluminum load, and specifically, the base point electric power of the electrolytic aluminum load is determined by the method shown in the formula (16):
Figure BDA0002718459410000151
wherein, PbaseBase point power, P, for electrolytic aluminum loadcurReal-time power for electrolytic aluminium load, PfcstLoad prediction for electrolytic aluminum load or user submission of updated baseline load.
It can be seen that, when the control state of the electrolytic aluminum load is the call-able state, the base power of the electrolytic aluminum load is the real-time power of the electrolytic aluminum load.
S4: and superposing the base power of the electrolytic aluminum load and the adjustment power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and controlling the power of the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
Specifically, the target power P of the electrolytic aluminum load is determined by the method shown in the formula (17)des：
Pdes＝Preg+Pbase (17)。
And then issuing the target power of the electrolytic aluminum load to an electrolytic aluminum load controller through an SCADA system, monitoring the target power tracking of the output power to the electrolytic aluminum load, and finishing the response to the active power regulation requirement of the power system in the control area.
In conclusion, compared with the AGC technology, the method for controlling the power system by the electrolytic aluminum load increases the power regulation capability of the power system in the control area by adding the electrolytic aluminum load resource, and simultaneously, adds a large amount of control links considering production and operation conditions for special regulation resources, ensures that the power regulation requirement of the power system in the control area is responded while the production influence of industrial users is reduced, and gives consideration to the benefits of the users and the power grid; compared with a demand response technology, the electrolytic aluminum load receives a unified scheduling instruction, so that the discordance of load regulation resources and power generation resource regulation can be avoided, and the risks of over-regulation, under-regulation and regulation conflict are greatly reduced.
In another embodiment of the present invention, a method for participating in power system control of an electrolytic aluminum load is provided, which, compared to the method for participating in power system control of an electrolytic aluminum load in the previous embodiment, further includes: and checking the adjusting power of the electrolytic aluminum load, specifically, checking the adjusting power of the electrolytic aluminum load, and updating the adjusting power of the electrolytic aluminum load to be 0 when the adjusting power of the electrolytic aluminum load is in the action dead zone of the electrolytic aluminum load.
Specifically, the adjustment power of the electrolytic aluminum load can be checked by the method shown in formula (18):
Figure BDA0002718459410000161
wherein, PchngThe actual amount of action of the electrolytic aluminum load in this cycle, PctldbIs an action dead zone of electrolytic aluminum load, P'des＝Pcur+Pchng，P′desThe corrected target power of the electrolytic aluminum load is obtained.
Alternatively, the adjustment power of the electrolytic aluminum load may be checked by the method shown in formula (19):
Figure BDA0002718459410000162
through the checking process, the regulation power of the electrolytic aluminum load is ensured to be outside the action dead zone of the electrolytic aluminum load, and the regulation requirement of the electrolytic aluminum load can be normally completed.
Referring to fig. 4, in a further embodiment of the present invention, a system for participating in power system control of an electrolytic aluminum load is provided, which can be used to implement the steps of the method related to participating in power system control of an electrolytic aluminum load in the above embodiment of the present invention.
The demand acquisition module is used for acquiring the regional regulation demand of the power system; the adjusting power determining module is used for obtaining the adjusting power of the electrolytic aluminum load according to the regional adjusting requirement of the power system; the base point power determining module is used for acquiring and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load; the control module is used for superposing the base power of the electrolytic aluminum load and the adjusting power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and the power control of the electrolytic aluminum load is carried out based on the target power of the electrolytic aluminum load.
In yet another embodiment of the present invention, a terminal device is provided that includes a processor and a memory for storing a computer program comprising program instructions, the processor being configured to execute the program instructions stored by the computer storage medium. The Processor may be a Central Processing Unit (CPU), or may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which is a computing core and a control core of the terminal, and is adapted to implement one or more instructions, and is specifically adapted to load and execute one or more instructions to implement a corresponding method flow or a corresponding function; the processor of the embodiment of the invention can be used for the operation of the method for the electrolytic aluminum load to participate in the control of the power system, and comprises the following steps: acquiring the regional regulation requirement of the power system; obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system; obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load; and superposing the base power of the electrolytic aluminum load and the adjustment power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and controlling the power of the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
In still another embodiment of the present invention, the present invention further provides a storage medium, specifically a computer-readable storage medium (Memory), which is a Memory device in a terminal device and is used for storing programs and data. It is understood that the computer readable storage medium herein may include a built-in storage medium in the terminal device, and may also include an extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. It should be noted that the computer-readable storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory.
One or more instructions stored in a computer readable storage medium may be loaded and executed by a processor to perform the corresponding steps of the method for participating in power system control with respect to electrolytic aluminum load in the above embodiments; one or more instructions in the computer-readable storage medium are loaded by the processor and perform the steps of: acquiring the regional regulation requirement of the power system; obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system; obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load; and superposing the base power of the electrolytic aluminum load and the adjustment power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and controlling the power of the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (10)

1. A method for participating in power system control of an electrolytic aluminum load, comprising the steps of:
acquiring the regional regulation requirement of the power system;
obtaining the regulating power of the electrolytic aluminum load according to the regional regulating requirement of the power system;
obtaining and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load;
and superposing the base power of the electrolytic aluminum load and the adjustment power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load, and controlling the power of the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
2. The method for participating in power system control of an electrolytic aluminum load according to claim 1, wherein the specific method for acquiring the regional regulation requirement of the power system is as follows:
acquiring real-time frequency and real-time exchange power of an electric power system;
according to the real-time frequency and the real-time exchange power of the power system, combining the rated frequency and the exchange power plan of the power system to obtain the regional control deviation of the power system;
and obtaining the regional regulation requirement of the power system according to the regional control deviation of the power system.
3. The method for participating in power system control of electrolytic aluminum load according to claim 2, wherein the specific method for obtaining the regional regulation requirement of the power system according to the regional control deviation of the power system is as follows:
and respectively filtering and integrating the regional control deviation of the power system to obtain a filtering regional control deviation and a regional control deviation integral, superposing the filtering regional control deviation and the regional control deviation integral, and then taking a reverse value to obtain the regional regulation requirement of the power system.
4. The method for participating in power system control of the electrolytic aluminum load according to claim 1, wherein the specific method for obtaining the regulated power of the electrolytic aluminum load according to the regional regulation requirement of the power system is as follows:
the preset sharing coefficient of the electrolytic aluminum load is superposed with the result of the total sharing coefficient of the current power system, and the total sharing coefficient of the power system is updated;
and obtaining the proportion of the preset share coefficient of the electrolytic aluminum load to the total share coefficient, and obtaining the adjusting power of the electrolytic aluminum load by multiplying the proportion by the regional adjusting requirement of the power system.
5. The method for participating in power system control of the electrolytic aluminum load according to claim 1, wherein the specific method for obtaining and determining the control state of the electrolytic aluminum load according to the operation state of the electrolytic aluminum load is as follows:
acquiring the running state of the electrolytic aluminum load, wherein the running state comprises a residual adjusting time state, a yield delay state, a furnace temperature alarm state, a time period adjustable state, a standby triggering state and a maximum mileage state;
when the residual adjusting time state is that the residual adjusting time still exists, the yield lagging state is that the yield is not lagged, the furnace temperature alarming state is that the furnace temperature is normal, the time interval adjustable state is that the current time interval is in the adjustable time interval range of the electrolytic aluminum load, the standby triggering state is that the adjustment standby of the power system is insufficient, and the maximum mileage state is that the maximum adjusting mileage is not reached, the electrolytic aluminum load meets the calling condition; otherwise, the electrolytic aluminum load does not meet the calling condition;
when the electrolytic aluminum load does not meet the calling condition and the electrolytic aluminum load is being called, the electrolytic aluminum meets the power utilization condition for recovering the load; otherwise, the electrolytic aluminum does not meet the power utilization condition for recovering the load;
when the electrolytic aluminum load meets the calling condition and the electrolytic aluminum does not meet the load recovery electricity utilization condition, the control state of the electrolytic aluminum load is a calling-capable state, otherwise, the control state of the electrolytic aluminum load is a calling-incapable state.
6. The method of claim 1, wherein the baseline power of the electrolytic aluminum load is a real-time power of the electrolytic aluminum load.
7. The method of participating in power system control of an electrolytic aluminum load of claim 1, further comprising:
checking the regulating power of the electrolytic aluminum load, and updating the regulating power of the electrolytic aluminum load to be 0 when the regulating power of the electrolytic aluminum load is within the action dead zone of the electrolytic aluminum load.
8. A system for participation in power system control of an electrolytic aluminum load, comprising:
the demand acquisition module is used for acquiring the regional regulation demand of the power system;
the adjusting power determining module is used for obtaining the adjusting power of the electrolytic aluminum load according to the regional adjusting requirement of the power system;
the base point power determining module is used for acquiring and determining the control state of the electrolytic aluminum load according to the running state of the electrolytic aluminum load; when the control state of the electrolytic aluminum load is a calling state, acquiring the base point power of the electrolytic aluminum load; and
and the control module is used for superposing the base point power of the electrolytic aluminum load and the adjusting power of the electrolytic aluminum load to obtain the target power of the electrolytic aluminum load and carrying out power control on the electrolytic aluminum load based on the target power of the electrolytic aluminum load.
9. A computer arrangement comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the method of participating in the control of an electrical power system in an electrolytic aluminum load according to any one of claims 1 to 7.
10. A computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor, implements the steps of a method of participating in the control of an electrical power system on an electrolytic aluminum load as recited in any one of claims 1 to 7.
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