WO2017107358A1 - 一种电网链式稳定断面潮流控制方法、服务器 - Google Patents

一种电网链式稳定断面潮流控制方法、服务器 Download PDF

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Publication number
WO2017107358A1
WO2017107358A1 PCT/CN2016/081042 CN2016081042W WO2017107358A1 WO 2017107358 A1 WO2017107358 A1 WO 2017107358A1 CN 2016081042 W CN2016081042 W CN 2016081042W WO 2017107358 A1 WO2017107358 A1 WO 2017107358A1
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Prior art keywords
stable
section
stable section
chain
control
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PCT/CN2016/081042
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English (en)
French (fr)
Inventor
陈根军
顾全
徐晓亮
施雄华
金朝意
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J3/04—Arrangements for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling the transfer of power between connected networks; Controlling load sharing between connected networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J3/38—Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/46—Controlling the sharing of generated power between the generators, sources or networks

Definitions

  • the invention relates to a power system dispatching automation technology, in particular to a power grid chain stable section power flow control method and a server.
  • Power dispatching is a key link to ensure the safety, quality, economy and environmental protection of power grids.
  • the power dispatching automation system as the technical support system for power dispatching is the brain and command center of the power system.
  • the dispatcher of the power dispatching center relies on various information and functions provided by the power dispatching automation system to perform daily dispatching of the power system.
  • the monitoring and control of the grid stability section is an important task.
  • the existing power dispatching automation system provides relatively limited technical support for dispatching operations.
  • the performance of the power grid stability section is currently only monitoring, and the control of the steady section power flow can only be done manually.
  • With the continuous expansion of the scale of the power grid, the increasingly complex power grid structure, and the complex and variable power grid operation mode it is more and more difficult to control the stability section of the power grid by manual means, and it is difficult to meet the requirements of real-time performance.
  • Daily dispatching and safe and stable operation of the grid bring new challenges.
  • an embodiment of the present invention provides a power grid chain stable section power flow control method and server.
  • the output of the associated control unit is adjusted according to the related information of the adjustment between the upper and lower stages of the chain stable section set, so as to The upper limit of the stable section in the set of stable sections is subjected to upper limit control;
  • the related control unit is adjusted according to the related information of the adjustment between the upper and lower stage stable sections in the chain stable section set and the adjustment information of the adjusted unit The output of the lower limit of the stable cross section of the chain stable section set;
  • the grid chain stable section is an associated set of stable sections, and the stable section in the set of stable sections is a chain structure;
  • the stabilizing section is an associated set of lines or sets of transformers; the tidal current of the stabilizing section is the sum of a set of lines or transformer flows included in the stabilizing section.
  • the determining whether the stable sections exceed the limit includes:
  • the associated control unit is a group of generators associated with the stable section
  • the adjustment correlates with the output of the control unit to perform upper limit control on the upper limit stable section of the chain stable section set, including:
  • Adjusting the output of the associated control unit to perform a lower limit control on the lower limit stable section of the chain stable section set including:
  • the method further includes:
  • the upper limit of the upper limit of the stable section of the chain stable section is first controlled, and then the chain stable section is set.
  • the lower limit of the stable section of the lower limit of the middle and lower limits is controlled;
  • the method further includes:
  • the method further includes:
  • the upper limit information of the upper section of the stable section is integrated.
  • the statistics all the total adjustments of the chain-stabilized section power flow control unit are counted, and the automatic power generation control AGC area control adjustment quantity is updated, including:
  • a judging unit configured to determine whether the stable sections are out of limits according to the power flow and the control section of each stable section in the grid chain stable section set;
  • a first adjusting unit configured to adjust an output of the associated control unit according to the related information adjusted between the upper and lower stable sections in the chain stable section set when there is a higher limit of the stable section in the grid chain stable section set , the upper limit control is performed on the upper limit stable section in the chain stable section set;
  • a second adjusting unit configured to: when the lower limit of the stable section exists in the set of the stable chain sections of the power grid, according to the related information adjusted between the upper and lower stable sections of the chain stable section set and the adjustment information of the adjusted unit Adjusting the output of the associated control unit to perform a lower limit control on the lower limit stable section of the chain stable section set;
  • the update unit is configured to count the total adjustment amount of all the flow control units participating in the chain stable section, and update the AGC area control adjustment amount.
  • the grid chain stable section is an associated set of stable sections, and the stable section in the set of stable sections is a chain structure;
  • the stabilizing section is an associated set of lines or sets of transformers; the tidal current of the stabilizing section is the sum of a set of lines or transformer flows included in the stabilizing section.
  • the determining unit includes:
  • a determining subunit configured to determine whether the tidal current of each stable section exceeds a control upper limit or is lower than a lower control limit
  • Determining a subunit wherein when the flow of the stable section exceeds the upper limit of the control, determining that the upper limit of the stable section is upper; and when the flow of the stable section is lower than the lower limit of the control, determining a lower limit of the stable section.
  • the associated control unit is a group of generators associated with the stable section
  • the first adjusting unit is further configured to control a flow of the upper limit stable section in the chain stable section set by adjusting an output of the generator;
  • the second adjusting unit is further configured to control a flow of a stable section of the chain stable section set to a lower limit by adjusting an output of the generator.
  • the server further includes:
  • control unit configured to perform upper limit control on the upper limit stable section of the chain stable section set when the upper limit of the stable section and the lower limit of the stable section are simultaneously present in the grid chain stable section set, and then The lower limit of the stable section in the chain stable section set is controlled by the lower limit;
  • the server further includes:
  • the calculating unit is configured to calculate, according to the adjustment amount of the control unit of the lower stable section corresponding to the stable section, the adjustment amount of the upper stable section related control unit in the chain stable section set.
  • the server further includes:
  • the associating unit is configured to synthesize the upper limit information of the upper section of the stable section when the lower limit control of the stable section of the lower limit is performed by increasing the output of the stable section associated control unit.
  • the updating unit is further configured to: when the influence of the chain-type stable section power flow control on the AGC area control is performed, when the power flow of the power grid chain stable section is controlled, the power grid is counted All of the over-limit stable sections in the set of chain-stabilized sections are associated with the total adjustment of the control unit, which is deducted during control of the AGC zone.
  • the lower limit control is performed on the stable lower cross section of the chain stable section set; the total adjustment amount of all the flow control units participating in the chain stable section is counted, and the AGC area control adjustment amount is updated. It can be seen that, in the embodiment of the present invention, by adjusting the output of the associated control unit of each stable section of the chain-stabilized section, the upper limit control and the lower limit control are performed on the stable sections of the chain-type stable section, and the steady section flow is limited to the allowable interval, thereby realizing The automatic control of the power grid chain stable section tidal current effectively improves the control ability of the grid chain stable section tidal current, and reduces the control pressure of the grid dispatcher on the steady section tidal current.
  • FIG. 1 is a schematic flow chart of a power grid chain stabilized section power flow control method according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flow chart of a power grid chain stabilized section power flow control method according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic view showing a chain structure of a stable section according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an upper limit control flow of a grid chain stable section according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an upper limit control flow of a grid chain stable section according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a server according to an embodiment of the present invention.
  • the embodiments of the present invention provide a power grid chain stable section power flow control method and server, which can automatically control the power flow stability section power flow, ensure that the power grid stable section power flow always runs in a reasonable interval, and realize grid safety and economic operation. At the same time, reduce the adjustment pressure of the dispatcher on the stability section of the grid.
  • the over-limit condition of the stable section is judged; when there is an upper-limit stable section, the upper and lower stages in the chain-stabilized section are considered.
  • the upper limit of each stable section in the chain-type stable section is controlled by adjusting the output of the associated control unit; when there is a lower-limit stable section, the chain-stabilized section is considered simultaneously.
  • the interaction between the adjustment of the stable section of the middle and lower stages and the adjustment of the adjusted unit By adjusting the output of the associated control unit, the lower limit of the lower limit of the chain-type stable section is controlled.
  • all the participating chain stabilizations are counted.
  • the total adjustment of the section flow control unit is updated to control the AGC area control adjustment.
  • FIG. 1 is a schematic flow chart of a power grid chain stabilized section power flow control method according to Embodiment 1 of the present invention. As shown in FIG. 1 , the power grid chain stabilized section power flow control method includes the following steps:
  • Step 101 Determine whether the stable sections are out of limits according to the power flow and the control interval of each stable section in the grid chain stable section set.
  • the grid chain stable section is an associated set of stable sections, and the stable section in the set of stable sections is a chain structure.
  • the stable section is an associated set of lines or transformer sets; the tidal current of the stable section is the sum of a set of lines or transformer flows included in the stable section.
  • the determining whether the stable sections exceed the limit includes:
  • Step 102 When there is a higher limit of the stable section in the grid chain stable section set, according to the related information of the adjustment between the upper and lower stage stable sections in the chain stable section set, the output of the associated control unit is adjusted to The upper limit of the stable upper section in the chain stable section set is controlled by the upper limit.
  • the associated control unit is a group of generators associated with the stable section.
  • the adjustment is associated with controlling the output of the unit to perform a higher stability upper section of the chain stable section set Limit control, including:
  • Step 103 When there is a lower limit of the stable section in the grid chain stable section set, adjust the related information according to the adjustment information between the upper and lower stable sections in the chain stable section set and the adjustment information of the adjusted unit.
  • the output of the control unit is associated with the lower limit of the stable section of the chain stable section set.
  • the adjusting the output of the associated control unit to perform a lower limit control on the lower limit stable section of the chain stable section set includes:
  • the upper limit of the upper limit of the stable section of the chain type is first controlled, and then the upper limit is controlled.
  • the lower limit of the stable cross section of the chain stable section set is controlled by the lower limit;
  • the adjustment amount of the upper stable section related control unit in the chain stable section set is calculated according to the adjustment amount of all the lower stable section related control units corresponding to the stable section.
  • the upper limit information of the upper section of the stable section is integrated.
  • Step 104 Count the total adjustment amount of all the flow control units participating in the chain stable section, and update the AGC area control adjustment amount.
  • the chain-type stable section power flow control on the AGC area control
  • all the limits in the power grid chain stable section set are counted.
  • the stable section is associated with the total adjustment amount of the control unit, and the total adjustment amount is subtracted when the AGC area is controlled.
  • the embodiment of the present invention by adjusting the output of the associated control unit of each stable section of the chain-stabilized section, the upper and lower limits of the stable sections of the chain-type stable section are controlled, and the steady section flow is limited to the allowable interval.
  • the automatic control of the power flow chain chain stable section current is realized, which effectively improves the control ability of the power grid chain stable section power flow, and reduces the control pressure of the power grid dispatcher on the steady section flow.
  • the power grid chain stabilized section power flow control method includes the following steps:
  • Step 201 traverse all stable sections of the grid chain stable section and calculate the flow of all stable sections.
  • the grid chain stable section refers to an associated set of stable sections, and the stable section in the set is
  • the structure constitutes a chain structure
  • the embodiment of the present invention also refers to the stable section as a section, as shown in FIG. 3, in which the section 1 is the upper section of the section 2 and the section 3, and the section 2 is the section 4 and the section 5
  • section 2 and section 3 are the lower sections of section 1
  • section 4 and section 5 are the lower sections of section 2.
  • the relationship between the upper and lower sections of the section is conductive.
  • section 1 is also the upper section of all other sections
  • section 10 is also the lower section of section 2.
  • the grid-chain stable section is defined by the chain-stable section definition tool. In addition to defining the stable sections of the grid-chain stable section and its composition, it is also necessary to define the relationship between the sub-levels of the stable sections of the grid chain-type stable section.
  • the stable section refers to an associated set of lines or transformer sets;
  • the stable section tidal current refers to the sum of a set of lines or transformer flows included in the stable section.
  • the line or transformer flow required to calculate the steady section flow is derived from the real-time measurement data of the dispatch automation system.
  • Step 202 Compare the power flow and the upper and lower limits of each section of the chain-stabilized section to determine whether the stable section exceeds the limit.
  • the exceeding the limit of the stable section means that the steady section tidal current exceeds the upper control limit or is lower than the lower control limit thereof, and corresponds to the upper limit and the lower limit respectively.
  • the steady section tidal current is calculated according to step 201.
  • the upper control limit and the lower control limit of the stable section are calculated offline by the grid mode calculation personnel, and can be modified online by the dispatcher according to the actual operation of the power grid.
  • the upper control limit and the lower control limit of the stable section constitute the control interval of the steady section flow, wherein whether the steady section flow exceeds the upper limit of control is a sign of whether the grid is safely operated, and whether the steady section flow is lower than the lower limit of control as a sign of whether the grid is economically operated .
  • Step 203 It is determined whether there is a stable upper section of the upper limit; if yes, step 204 is performed; otherwise, step 205 is performed.
  • Step 204 Consider adjusting the mutual influence between the upper and lower sections, and adjusting the output of the associated control unit to control the upper limit of the upper limit of the chain stable section.
  • the associated control unit refers to a group of generators associated with the stable section, and the steady section flow can be controlled by adjusting the output of the generator.
  • FIG. 4 is a schematic diagram of an upper limit control flow of a grid chain stable section according to an embodiment of the present invention, as shown in FIG. 4, the specific process is as follows:
  • Step 401 traverse all the upper limit stable sections of the grid chain stable section
  • Step 402 Check whether there is an upper limit stable section that is not controlled, if not, then end this step, otherwise, perform step 403;
  • Step 403 selecting a lowermost stable section from the upper limit stable section that has not been controlled as the current control section;
  • Step 404 Calculate the sum of the output adjustments of all the associated units of the lower section of the stable section;
  • Step 405 Calculate the sum of the output adjustments of the associated units of the stable section, as follows:
  • C reg represents the sum of the output adjustments of the units associated with the stable section
  • C lmx represents the upper limit of the stability section control
  • C db represents the control dead zone
  • C mw represents the steady section tidal current
  • C reged represents the output of all the associated units of the lower section of the stability section.
  • Step 406 Check whether the sum of the associated unit output adjustment amount C reg calculated in step 405 is less than 0, if it is less than 0, proceed to step 407, otherwise go to step 402;
  • Step 407 Allocating the associated unit adjustment amount C reg among the associated units to obtain the adjustment amount of each associated unit, and the adjustment amount allocation mode of each associated unit is allocated according to the adjustment margin of each associated unit;
  • Step 408 It is forbidden to increase the output of the associated unit of all the lower sections of the stable section, because this will cause the stable section to continue to upper limit, thereby making the upper limit control useless.
  • Step 205 It is determined whether there is a stable cross section with a lower limit; if yes, step 206 is performed; otherwise, step 207 is performed.
  • Step 206 Consider the mutual influence between the adjustment of the upper and lower stable sections in the chain stable section set and the adjustment of the adjusted unit, and adjust the output of the associated control unit to perform the stable section of the lower limit of the chain stable section set. Lower limit control.
  • FIG. 5 is a schematic diagram of an upper limit control flow of a grid chain stable section according to an embodiment of the present invention. As shown in FIG. 5, the specific process is as follows:
  • Step 501 traverse all the lower limit stable sections of the grid chain stable section
  • Step 502 Check whether there is a lower limit stable section that is not controlled, if not, then end this step, otherwise, perform step 503;
  • Step 503 selecting a lowermost stable section as the current control section from the lower limit stable section that has not been controlled;
  • Step 504 Calculate a sum of output adjustments of all associated units of the lower section of the stable section
  • Step 505 Calculate the sum of the output adjustments of the associated units of the stable section, as follows:
  • C reg represents the sum of the output adjustments of the units associated with the stable section
  • C lmx represents the upper limit of the stability section control
  • C db represents the control dead zone
  • C mw represents the steady section tidal current
  • C reged represents the output of all the associated units of the lower section of the stability section.
  • Step 506 Calculate an upward maximum adjustment amount of all upper sections of the stable section
  • Step 507 It is determined whether the sum of the output adjustment amounts of the associated units is greater than the upward maximum adjustment amount of the upper sectional section; if yes, step 508 is performed; otherwise, step 509 is performed.
  • Step 508 taking the sum of the output adjustments of the associated units of the stable section C reg is the maximum upward adjustment of the upper section, otherwise C reg remains unchanged;
  • Step 509 Check whether the calculated total unit output adjustment amount C reg is greater than 0, if it is greater than 0, proceed to step 509, otherwise go to step 502;
  • Step 510 Allocating the associated unit adjustment amount C reg among the associated units to obtain the adjustment amount of each associated unit, and the adjustment amount allocation mode of each associated unit is allocated according to the adjustment margin of each associated unit.
  • Step 207 Count the total adjustment amount of all the flow control units participating in the chain stable section, and update the AGC area control adjustment amount.
  • control area uses AGC for regional control to maintain the regional frequency and exchange power with other adjacent areas.
  • AGC Access Management Function
  • FIG. 6 is a schematic structural diagram of a server according to an embodiment of the present invention. As shown in FIG. 6, the server includes:
  • the determining unit 61 is configured to determine whether the stable sections are out of limits according to the power flow and the control section of each stable section in the grid chain stable section set;
  • a first adjusting unit 62 configured to adjust an associated control unit according to the related information adjusted between the upper and lower stable sections in the chain stable section set when there is a higher limit of the stable section in the grid chain stable section set Output, in order to control the upper limit of the upper limit of the chain stable section;
  • a second adjusting unit 63 configured to: when there is a lower limit of the stable section in the set of the stable chain sections of the power grid, according to the related information adjusted between the upper and lower stable sections of the chain stable section set and the adjustment of the adjusted unit Information, adjusting an output of the associated control unit to perform a lower limit control on a lower limit stable section of the chain stable section set;
  • the updating unit 64 is configured to count the total adjustment amount of all the chain-stable section power flow control units, and update the AGC area control adjustment amount.
  • the grid chain stable section is an associated set of stable sections, and the stable section in the set of stable sections is a chain structure;
  • the stabilizing section is an associated set of lines or sets of transformers; the tidal current of the stabilizing section is the sum of a set of lines or transformer flows included in the stabilizing section.
  • the determining unit 61 includes:
  • the determining subunit 611 is configured to determine whether the power flow of each stable section exceeds a control upper limit or is lower than a control lower limit;
  • the determining subunit 612 is configured to determine, when the tidal current of the stable section exceeds the upper limit of the control, an upper limit of the stable section; and when the tidal current of the stable section is lower than the lower limit of the control, determine a lower limit of the stable section.
  • the associated control unit is a group of generators associated with the stable section
  • the first adjusting unit 62 is further configured to control a flow of a stable section of the upper limit of the chain stable section by adjusting an output of the generator;
  • the second adjusting unit 63 is further configured to control a flow of a stable section of the chain stable section set with a lower limit by adjusting an output of the generator.
  • the server further includes:
  • the control unit 65 is configured to: when the upper limit of the stable section and the lower limit of the stable section are simultaneously existed in the grid chain stable section set, firstly, the upper limit of the upper limit stable section of the chain stable section set is controlled, and then The lower limit of the stable cross section of the chain stable section set is controlled by the lower limit;
  • the server further includes:
  • the calculating unit 66 is configured to calculate, according to the adjustment amount of the control unit of the lower stable section corresponding to the stable section, the adjustment amount of the upper stable section related control unit in the chain stable section set.
  • the server further includes:
  • the associating unit 67 is configured to synthesize the upper limit information of the upper section of the stable section when the lower limit control of the stable section of the lower limit is performed by increasing the output of the stable section associated control unit.
  • the updating unit 64 is further configured to: when controlling the flow of the grid-type stable section according to the influence of the chain-type stable section power flow control on the AGC area control, The total adjustment amount of all over-limit stable sections associated with the control group in the grid chain-stable section is deducted from the total adjustment amount when the AGC area is controlled.
  • the disclosed method and smart device may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling through some interfaces, devices or units.
  • a communication connection which may be electrical, mechanical or other form.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one second processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

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Abstract

一种电网链式稳定断面潮流控制方法、服务器，该方法包括：根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断各稳定断面是否越限（101）；当存在稳定断面越上限时，根据链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对链式稳定断面集合中越上限的稳定断面进行上限控制（102）；当存在稳定断面越下限时，根据链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节关联控制机组的出力，以对链式稳定断面集合中越下限的稳定断面进行下限控制（103）；统计所有参与链式稳定断面潮流控制机组的总调节量，并更新AGC区域控制调节量（104）。

Description

一种电网链式稳定断面潮流控制方法、服务器 技术领域
本发明涉及电力系统调度自动化技术，尤其涉及一种电网链式稳定断面潮流控制方法、服务器。
背景技术
电力调度是保障电网安全、优质、经济、环保运行的关键环节，电力调度自动化系统作为电力调度的技术支持系统是电力系统运行的大脑和指挥中心。
电力调度中心的调度员依靠电力调度自动化系统提供的各种信息和功能对电力系统进行日常调度，其中，电网稳定断面的监视和控制是一项重要工作。但是，现有的电力调度自动化系统给调度运行提供的技术支持相对有限，表现在电网稳定断面目前只有监视功能，对稳定断面潮流的控制只能通过人工方式。随着电网规模的不断扩大、电网结构的日益复杂和电网运行方式的复杂多变，通过人工方式对电网稳定断面进行控制的难度已经越来越大，而且很难满足实时性的要求，给调度员日常调度和电网安全稳定运行带来了新的挑战。
发明内容
为解决上述技术问题，本发明实施例提供了一种电网链式稳定断面潮流控制方法、服务器。
本发明实施例提供的电网链式稳定断面潮流控制方法，包括：
根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限；
当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制；
当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新自动发电控制(AGC， Automatic Generation Control)区域控制调节量。
本发明实施例中，所述电网链式稳定断面为相关联的一组稳定断面集合，所述稳定断面集合中的稳定断面为链式结构；
所述稳定断面为相关联的一组线路或者变压器集合；所述稳定断面的潮流为所述稳定断面包含的一组线路或者变压器潮流的总和。
本发明实施例中，所述判断所述各稳定断面是否越限，包括：
判断所述各稳定断面的潮流是否超过控制上限或者低于控制下限；
当稳定断面的潮流超过所述控制上限时，所述稳定断面越上限；
当稳定断面的潮流低于所述控制下限时，所述稳定断面越下限。
本发明实施例中，所述关联控制机组为与所述稳定断面相关联的一组发电机；
所述调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制，包括：
通过调节所述发电机的出力，控制所述链式稳定断面集合中越上限的稳定断面的潮流；
所述调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制，包括：
通过调节所述发电机的出力，控制所述链式稳定断面集合中越下限的稳定断面的潮流。
本发明实施例中，所述方法还包括：
当所述电网链式稳定断面集合中同时存在稳定断面越上限和稳定断面越下限时，先对所述链式稳定断面集合中越上限的稳定断面进行上限控制，再对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
其中，当进行所述下限控制时，所述越上限的稳定断面的数目减少或不变。
本发明实施例中，所述方法还包括：
根据所述稳定断面所对应的所有下级稳定断面关联控制机组的调节量，计算所述链式稳定断面集合中上级稳定断面关联控制机组的调节量。
本发明实施例中，所述方法还包括：
当增加所述稳定断面关联控制机组出力对所述越下限的稳定断面进行下限控制时，综合所述稳定断面的上级断面的越上限信息。
本发明实施例中，所述统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新自动发电控制AGC区域控制调节量，包括：
根据所述链式稳定断面潮流控制对AGC区域控制的影响，在对所述电网链式稳定断面的潮流进行控制时，统计所述电网链式稳定断面集合中所有越限的稳定断面关联控制机组的 总调节量，在所述AGC区域控制时扣除所述总调节量。
本发明实施例提供的服务器，包括：
判断单元，用于根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限；
第一调节单元，用于当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制；
第二调节单元，用于当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
更新单元，用于统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新AGC区域控制调节量。
本发明实施例中，所述电网链式稳定断面为相关联的一组稳定断面集合，所述稳定断面集合中的稳定断面为链式结构；
所述稳定断面为相关联的一组线路或者变压器集合；所述稳定断面的潮流为所述稳定断面包含的一组线路或者变压器潮流的总和。
本发明实施例中，所述判断单元包括：
判断子单元，用于判断所述各稳定断面的潮流是否超过控制上限或者低于控制下限；
确定子单元，用于当稳定断面的潮流超过所述控制上限时，确定所述稳定断面越上限；当稳定断面的潮流低于所述控制下限时，确定所述稳定断面越下限。
本发明实施例中，所述关联控制机组为与所述稳定断面相关联的一组发电机；
所述第一调节单元，还用于通过调节所述发电机的出力，控制所述链式稳定断面集合中越上限的稳定断面的潮流；
所述第二调节单元，还用于通过调节所述发电机的出力，控制所述链式稳定断面集合中越下限的稳定断面的潮流。
本发明实施例中，所述服务器还包括：
控制单元，用于当所述电网链式稳定断面集合中同时存在稳定断面越上限和稳定断面越下限时，先对所述链式稳定断面集合中越上限的稳定断面进行上限控制，再对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
其中，当进行所述下限控制时，所述越上限的稳定断面的数目减少或不变。
本发明实施例中，所述服务器还包括：
计算单元，用于根据所述稳定断面所对应的所有下级稳定断面关联控制机组的调节量，计算所述链式稳定断面集合中上级稳定断面关联控制机组的调节量。
本发明实施例中，所述服务器还包括：
关联单元，用于当增加所述稳定断面关联控制机组出力对所述越下限的稳定断面进行下限控制时，综合所述稳定断面的上级断面的越上限信息。
本发明实施例中，所述更新单元，还用于当根据所述链式稳定断面潮流控制对AGC区域控制的影响，在对所述电网链式稳定断面的潮流进行控制时，统计所述电网链式稳定断面集合中所有越限的稳定断面关联控制机组的总调节量，在所述AGC区域控制时扣除所述总调节量。
本发明实施例的技术方案中，根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限；当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制；当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制；统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新AGC区域控制调节量。可见，本发明实施例通过调节链式稳定断面集中各稳定断面关联控制机组的出力，对链式稳定断面集中各稳定断面进行上限控制和下限控制，将稳定断面潮流限制在允许的区间内，实现了电网链式稳定断面潮流的自动控制，有效提高了对电网链式稳定断面潮流的控制能力，减轻了电网调度员对稳定断面潮流的控制压力。
附图说明
图1为本发明实施例一的电网链式稳定断面潮流控制方法的流程示意图；
图2为本发明实施例二的电网链式稳定断面潮流控制方法的流程示意图；
图3为本发明实施例的稳定断面的链式结构示意图；
图4为本发明实施例的电网链式稳定断面上限控制流程示意图；
图5为本发明实施例的电网链式稳定断面上限控制流程示意图；
图6为本发明实施例的服务器的结构组成示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施 例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
随着电网规模的不断扩大、电网结构的日益复杂和电网运行方式的复杂多变，通过人工方式对电网稳定断面进行控制的难度已经越来越大，而且很难满足实时性的要求，给调度员日常调度和电网安全稳定运行带来了新的挑战。为此，本发明实施例提供了一种电网链式稳定断面潮流控制方法、服务器，能够对电网稳定断面潮流进行自动控制，保证电网稳定断面潮流始终运行在合理区间，在实现电网安全、经济运行的同时，减轻调度员对电网稳定断面的调整压力。
本发明实施例中，首先根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断稳定断面的越限情况；当存在越上限稳定断面时，在考虑链式稳定断面集合中上下级稳定断面之间调节相互影响的前提下，通过调节关联控制机组的出力，对链式稳定断面集合中各稳定断面进行上限控制；当存在越下限稳定断面时，同时考虑所述链式稳定断面集合中上下级稳定断面之间调节的相互影响和已调节机组的调节情况，通过调节关联控制机组的出力，对链式稳定断面集合中越下限的稳定断面进行下限控制；最后，统计所有参与链式稳定断面潮流控制机组的总调节量，更新AGC区域控制调节量。
图1为本发明实施例一的电网链式稳定断面潮流控制方法的流程示意图，如图1所示，所述电网链式稳定断面潮流控制方法包括以下步骤：
步骤101：根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限。
本发明实施例中，所述电网链式稳定断面为相关联的一组稳定断面集合，所述稳定断面集合中的稳定断面为链式结构。
本发明实施例中，所述稳定断面为相关联的一组线路或者变压器集合；所述稳定断面的潮流为所述稳定断面包含的一组线路或者变压器潮流的总和。
本发明实施例中，所述判断所述各稳定断面是否越限，包括：
判断所述各稳定断面的潮流是否超过控制上限或者低于控制下限；
当稳定断面的潮流超过所述控制上限时，所述稳定断面越上限；
当稳定断面的潮流低于所述控制下限时，所述稳定断面越下限。
步骤102：当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制。
本发明实施例中，所述关联控制机组为与所述稳定断面相关联的一组发电机。
所述调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上 限控制，包括：
通过调节所述发电机的出力，控制所述链式稳定断面集合中越上限的稳定断面的潮流。
步骤103：当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制。
本发明实施例中，所述调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制，包括：
通过调节所述发电机的出力，控制所述链式稳定断面集合中越下限的稳定断面的潮流。
本发明实施例中，当所述电网链式稳定断面集合中同时存在稳定断面越上限和稳定断面越下限时，先对所述链式稳定断面集合中越上限的稳定断面进行上限控制，再对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
其中，当进行所述下限控制时，所述越上限的稳定断面的数目减少或不变。
本发明实施例中，根据所述稳定断面所对应的所有下级稳定断面关联控制机组的调节量，计算所述链式稳定断面集合中上级稳定断面关联控制机组的调节量。
本发明实施例中，当增加所述稳定断面关联控制机组出力对所述越下限的稳定断面进行下限控制时，综合所述稳定断面的上级断面的越上限信息。
步骤104：统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新AGC区域控制调节量。
本发明实施例中，根据所述链式稳定断面潮流控制对AGC区域控制的影响，在对所述电网链式稳定断面的潮流进行控制时，统计所述电网链式稳定断面集合中所有越限的稳定断面关联控制机组的总调节量，在所述AGC区域控制时扣除所述总调节量。
本发明实施例的技术方案，通过调节链式稳定断面集中各稳定断面关联控制机组的出力，对链式稳定断面集中各稳定断面进行上限和下限控制，将稳定断面潮流限制在允许的区间内，实现电网链式稳定断面潮流的自动控制，有效提高对电网链式稳定断面潮流的控制能力，减轻电网调度员对稳定断面潮流的控制压力。
下面结合具体应用场景对本发明实施例的电网链式稳定断面潮流控制方法再做详细描述。
图2为本发明实施例二的电网链式稳定断面潮流控制方法的流程示意图，如图2所示，所述电网链式稳定断面潮流控制方法包括以下步骤：
步骤201：遍历电网链式稳定断面集中所有稳定断面，计算所有稳定断面的潮流。
这里，所述电网链式稳定断面是指相关联的一组稳定断面集合，该集合中的稳定断面在 结构上构成一种链式结构，本发明实施例也将稳定断面简称为断面，如图3所示，图中，断面1为断面2、断面3的上级断面，断面2为断面4、断面5的上级断面；反之，断面2、断面3为断面1的下级断面，断面4、断面5为断面2的下级断面。同时，断面的上下级关系具有传导性，图中，断面1也是所有其它断面的上级断面，断面10也是断面2的下级断面。电网链式稳定断面采用链式稳定断面定义工具进行定义，除了定义电网链式稳定断面集中各稳定断面及其组成外，还需要定义电网链式稳定断面集中各稳定断面之间的上下级关系。
这里，所述稳定断面是指相关联的一组线路或者变压器集合；所述稳定断面潮流是指所述稳定断面包含的一组线路或者变压器潮流的总和。计算稳定断面潮流所需的线路或者变压器潮流来自调度自动化系统的实时量测数据。
步骤202：比较链式稳定断面集中各断面的潮流和控制上下限，判断稳定断面是否越限。
这里，所述稳定断面越限是指所述稳定断面潮流超过其控制上限或者低于其控制下限，分别对应越上限和越下限。
所述稳定断面潮流根据步骤201计算得到，所述稳定断面的控制上限和控制下限由电网方式计算人员离线计算设定，并可由调度员根据电网实际运行情况在线修改。稳定断面的控制上限和控制下限构成了该稳定断面潮流的控制区间，其中，稳定断面潮流是否超出控制上限作为电网是否安全运行的标志，稳定断面潮流是否低于控制下限作为电网是否经济运行的标志。
步骤203：判断是否存在越上限的稳定断面；是时，执行步骤204；否时，执行步骤205。
步骤204：考虑上下级断面间调节相互影响，通过调节关联控制机组的出力，对链式稳定断面集合中越上限的稳定断面进行上限控制。
这里，所述关联控制机组是指与所述稳定断面相关联的一组发电机，通过调节所述发电机的出力，可以控制所述稳定断面潮流。
图4为本发明实施例的电网链式稳定断面上限控制流程示意图，如图4所示，具体流程阐述如下：
步骤401：遍历电网链式稳定断面集中所有越上限稳定断面；
步骤402：检查是否存在未进行控制的越上限稳定断面，如果没有，则结束本步骤，否则，执行步骤403；
步骤403：从未进行控制的越上限稳定断面中，选择一个最下级的稳定断面，作为当前控制断面；
步骤404：计算该稳定断面所有下级断面关联机组的出力调节量总和；
步骤405：计算该稳定断面关联机组的出力调节量总和，如下式：
Creg＝Clmx-Cdb-Cmw-Creged
其中，Creg代表稳定断面关联机组的出力调节量总和，Clmx代表稳定断面控制上限，Cdb代表控制死区，Cmw代表稳定断面潮流，Creged代表该稳定断面所有下级断面关联机组的出力调节量总和；
步骤406：检查步骤405中计算出的关联机组出力调节量总和Creg是否小于0，如果小于0，则执行步骤407，否则转步骤402；
步骤407：将关联机组调节量总和Creg在各关联机组间分配，得到各关联机组的调节量，各关联机组间调节量分配方式采用按各关联机组的调节裕度进行分配；
步骤408：禁止该稳定断面所有下级断面的关联机组上调出力，因为这会导致该稳定断面继续越上限，从而使越上限控制失去作用。
步骤205：判断是否存在越下限的稳定断面；是时，执行步骤206；否时，执行步骤207。
步骤206：考虑所述链式稳定断面集合中上下级稳定断面之间调节的相互影响和已调节机组的调节情况，通过调节关联控制机组的出力，对链式稳定断面集合中越下限的稳定断面进行下限控制。
图5为本发明实施例的电网链式稳定断面上限控制流程示意图，如图5所示，具体流程阐述如下：
步骤501：遍历电网链式稳定断面集中所有越下限稳定断面；
步骤502：检查是否存在未进行控制的越下限稳定断面，如果没有，则结束本步骤，否则，执行步骤503；
步骤503：从未进行控制的越下限稳定断面中，选择一个最下级的稳定断面，作为当前控制断面；
步骤504：计算该稳定断面所有下级断面关联机组的出力调节量总和；
步骤505：计算该稳定断面关联机组的出力调节量总和，如下式：
Creg＝Clmx-Cdb-Cmw-Creged
其中，Creg代表稳定断面关联机组的出力调节量总和，Clmx代表稳定断面控制上限，Cdb代表控制死区，Cmw代表稳定断面潮流，Creged代表该稳定断面所有下级断面关联机组的出力调节量总和；
步骤506：计算该稳定断面的所有上级断面的向上最大调节量；
步骤507：判断关联机组出力调节量总和是否大于上级断面向上最大调节量；是时，执行步骤508；否时，执行步骤509。
步骤508：取该稳定断面关联机组出力调节量总和Creg为上级断面向上最大调节量，否则Creg保持不变；
步骤509：检查计算出的关联机组出力调节量总和Creg是否大于0，如果大于0，则执行步骤509，否则转步骤502；
步骤510：将关联机组调节量总和Creg在各关联机组间分配，得到各关联机组的调节量，各关联机组间调节量分配方式采用按各关联机组的调节裕度进行分配。
步骤207：统计所有参与链式稳定断面潮流控制机组的总调节量，更新AGC区域控制调节量。
正常情况下，控制区利用AGC进行区域控制，维持区域频率及与其它相邻区域交换功率恒定。当区域部分机组参与链式稳定断面潮流控制时，需要考虑这部分机组调节对区域控制的影响，需要在区域控制调节量中扣除这部分调节量。
图6为本发明实施例的服务器的结构组成示意图，如图6所示，所述服务器包括：
判断单元61，用于根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限；
第一调节单元62，用于当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制；
第二调节单元63，用于当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
更新单元64，用于统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新AGC区域控制调节量。
本发明实施例中，所述电网链式稳定断面为相关联的一组稳定断面集合，所述稳定断面集合中的稳定断面为链式结构；
所述稳定断面为相关联的一组线路或者变压器集合；所述稳定断面的潮流为所述稳定断面包含的一组线路或者变压器潮流的总和。
本发明实施例中，所述判断单元61包括：
判断子单元611，用于判断所述各稳定断面的潮流是否超过控制上限或者低于控制下限；
确定子单元612，用于当稳定断面的潮流超过所述控制上限时，确定所述稳定断面越上限；当稳定断面的潮流低于所述控制下限时，确定所述稳定断面越下限。
本发明实施例中，所述关联控制机组为与所述稳定断面相关联的一组发电机；
所述第一调节单元62，还用于通过调节所述发电机的出力，控制所述链式稳定断面集合中越上限的稳定断面的潮流；
所述第二调节单元63，还用于通过调节所述发电机的出力，控制所述链式稳定断面集合中越下限的稳定断面的潮流。
本发明实施例中，所述服务器还包括：
控制单元65，用于当所述电网链式稳定断面集合中同时存在稳定断面越上限和稳定断面越下限时，先对所述链式稳定断面集合中越上限的稳定断面进行上限控制，再对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
其中，当进行所述下限控制时，所述越上限的稳定断面的数目减少或不变。
本发明实施例中，所述服务器还包括：
计算单元66，用于根据所述稳定断面所对应的所有下级稳定断面关联控制机组的调节量，计算所述链式稳定断面集合中上级稳定断面关联控制机组的调节量。
本发明实施例中，所述服务器还包括：
关联单元67，用于当增加所述稳定断面关联控制机组出力对所述越下限的稳定断面进行下限控制时，综合所述稳定断面的上级断面的越上限信息。
本发明实施例中，所述更新单元64，还用于当根据所述链式稳定断面潮流控制对AGC区域控制的影响，在对所述电网链式稳定断面的潮流进行控制时，统计所述电网链式稳定断面集合中所有越限的稳定断面关联控制机组的总调节量，在所述AGC区域控制时扣除所述总调节量。
本领域技术人员应当理解，图6所示的服务器中的各单元的实现功能可参照前述电网链式稳定断面潮流控制方法的相关描述而理解。
本发明实施例所记载的技术方案之间，在不冲突的情况下，可以任意组合。
在本发明所提供的几个实施例中，应该理解到，所揭露的方法和智能设备，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合 或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个第二处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。

Claims (16)

  1. 一种电网链式稳定断面潮流控制方法，其特征在于，所述方法包括：
    根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限；
    当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制；
    当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
    统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新自动发电控制AGC区域控制调节量。
  2. 根据权利要求1所述的电网链式稳定断面潮流控制方法，其特征在于，
    所述电网链式稳定断面为相关联的一组稳定断面集合，所述稳定断面集合中的稳定断面为链式结构；
    所述稳定断面为相关联的一组线路或者变压器集合；所述稳定断面的潮流为所述稳定断面包含的一组线路或者变压器潮流的总和。
  3. 根据权利要求2所述的电网链式稳定断面潮流控制方法，其特征在于，所述判断所述各稳定断面是否越限，包括：
    判断所述各稳定断面的潮流是否超过控制上限或者低于控制下限；
    当稳定断面的潮流超过所述控制上限时，所述稳定断面越上限；
    当稳定断面的潮流低于所述控制下限时，所述稳定断面越下限。
  4. 根据权利要求2所述的电网链式稳定断面潮流控制方法，其特征在于，所述关联控制机组为与所述稳定断面相关联的一组发电机；
    所述调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制，包括：
    通过调节所述发电机的出力，控制所述链式稳定断面集合中越上限的稳定断面的潮流；
    所述调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制，包括：
    通过调节所述发电机的出力，控制所述链式稳定断面集合中越下限的稳定断面的潮流。
  5. 根据权利要求1所述的电网链式稳定断面潮流控制方法，其特征在于，所述方法还 包括：
    当所述电网链式稳定断面集合中同时存在稳定断面越上限和稳定断面越下限时，先对所述链式稳定断面集合中越上限的稳定断面进行上限控制，再对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
    其中，当进行所述下限控制时，所述越上限的稳定断面的数目减少或不变。
  6. 根据权利要求2所述的电网链式稳定断面潮流控制方法，其特征在于，所述方法还包括：
    根据所述稳定断面所对应的所有下级稳定断面关联控制机组的调节量，计算所述链式稳定断面集合中上级稳定断面关联控制机组的调节量。
  7. 根据权利要求2所述的电网链式稳定断面潮流控制方法，其特征在于，所述方法还包括：
    当增加所述稳定断面关联控制机组出力对所述越下限的稳定断面进行下限控制时，综合所述稳定断面的上级断面的越上限信息。
  8. 根据权利要求4所述的电网链式稳定断面潮流控制方法，其特征在于，所述统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新自动发电控制AGC区域控制调节量，包括：
    根据所述链式稳定断面潮流控制对AGC区域控制的影响，在对所述电网链式稳定断面的潮流进行控制时，统计所述电网链式稳定断面集合中所有越限的稳定断面关联控制机组的总调节量，在所述AGC区域控制时扣除所述总调节量。
  9. 一种服务器，其特征在于，所述服务器包括：
    判断单元，用于根据电网链式稳定断面集合中各稳定断面的潮流和控制区间，判断所述各稳定断面是否越限；
    第一调节单元，用于当所述电网链式稳定断面集合中存在稳定断面越上限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息，调节关联控制机组的出力，以对所述链式稳定断面集合中越上限的稳定断面进行上限控制；
    第二调节单元，用于当所述电网链式稳定断面集合中存在稳定断面越下限时，根据所述链式稳定断面集合中上下级稳定断面之间调节的关联信息和已调节机组的调节信息，调节所述关联控制机组的出力，以对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
    更新单元，用于统计所有参与所述链式稳定断面潮流控制机组的总调节量，并更新AGC区域控制调节量。
  10. 根据权利要求9所述的服务器，其特征在于，
    所述电网链式稳定断面为相关联的一组稳定断面集合，所述稳定断面集合中的稳定断面为链式结构；
    所述稳定断面为相关联的一组线路或者变压器集合；所述稳定断面的潮流为所述稳定断面包含的一组线路或者变压器潮流的总和。
  11. 根据权利要求10所述的服务器，其特征在于，所述判断单元包括：
    判断子单元，用于判断所述各稳定断面的潮流是否超过控制上限或者低于控制下限；
    确定子单元，用于当稳定断面的潮流超过所述控制上限时，确定所述稳定断面越上限；当稳定断面的潮流低于所述控制下限时，确定所述稳定断面越下限。
  12. 根据权利要求10所述的服务器，其特征在于，所述关联控制机组为与所述稳定断面相关联的一组发电机；
    所述第一调节单元，还用于通过调节所述发电机的出力，控制所述链式稳定断面集合中越上限的稳定断面的潮流；
    所述第二调节单元，还用于通过调节所述发电机的出力，控制所述链式稳定断面集合中越下限的稳定断面的潮流。
  13. 根据权利要求9所述的服务器，其特征在于，所述服务器还包括：
    控制单元，用于当所述电网链式稳定断面集合中同时存在稳定断面越上限和稳定断面越下限时，先对所述链式稳定断面集合中越上限的稳定断面进行上限控制，再对所述链式稳定断面集合中越下限的稳定断面进行下限控制；
    其中，当进行所述下限控制时，所述越上限的稳定断面的数目减少或不变。
  14. 根据权利要求10所述的服务器，其特征在于，所述服务器还包括：
    计算单元，用于根据所述稳定断面所对应的所有下级稳定断面关联控制机组的调节量，计算所述链式稳定断面集合中上级稳定断面关联控制机组的调节量。
  15. 根据权利要求10所述的服务器，其特征在于，所述服务器还包括：
    关联单元，用于当增加所述稳定断面关联控制机组出力对所述越下限的稳定断面进行下限控制时，综合所述稳定断面的上级断面的越上限信息。
  16. 根据权利要求12所述的服务器，其特征在于，所述更新单元，还用于当根据所述链式稳定断面潮流控制对AGC区域控制的影响，在对所述电网链式稳定断面的潮流进行控制时，统计所述电网链式稳定断面集合中所有越限的稳定断面关联控制机组的总调节量，在所述AGC区域控制时扣除所述总调节量。
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