CN106300369B - A kind of Hierarchical Voltage Control System and method based on equivalent voltage landing index - Google Patents

A kind of Hierarchical Voltage Control System and method based on equivalent voltage landing index Download PDF

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CN106300369B
CN106300369B CN201610655861.2A CN201610655861A CN106300369B CN 106300369 B CN106300369 B CN 106300369B CN 201610655861 A CN201610655861 A CN 201610655861A CN 106300369 B CN106300369 B CN 106300369B
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msup
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voltage
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CN106300369A (en
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刘�东
陈飞
翁嘉明
李庆生
唐广学
皮显松
赵庆明
王晶明
王丰元
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Shanghai Jiaotong University
Guizhou Power Grid Co Ltd
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Shanghai Jiaotong University
Guizhou Power Grid 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
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a kind of Hierarchical Voltage Control System based on equivalent voltage landing index, including：Regional coordination voltage controller towards transformer station's level, the local voltage controller towards feeder line level；Local voltage controller is estimated voltage's distribiuting in feeder line based on limited measurement, calculates equivalent voltage landing index on this basis；After voltage out-of-limit, local voltage controller is based on reactive apparatus input situation in voltage estimated result and equivalent voltage landing index determining area, if the regulation fails, carries out auxiliary adjustment using regional coordination voltage controller and realizes that voltage out-of-limit recovers.The invention also discloses a kind of control method corresponding with said system simultaneously.The system and method has considered the characteristics of power distribution network considerable measuring point deficiency, makes full use of Distributed Generation in Distribution System, Reactive-power control equipment to realize quick, efficient distribution network voltage control based on equivalent voltage landing index.

Description

A kind of Hierarchical Voltage Control System and method based on equivalent voltage landing index
Technical field
It is more particularly to a kind of based on equivalent voltage landing index the present invention relates to intelligent grid voltage control technology field Hierarchical Voltage Control System and method.
Background technology
Intermittent energy accesses in power distribution network proposes higher demand to voltage control, at the same time, controlled distribution formula electricity It is multiple that the addition of the controllable elements such as source, energy storage device and new DFACTs equipment increases distribution network voltage control to a great extent Miscellaneous degree, make existing control mode challenged.IEEE1547 standards define excision point when output voltage fluctuates The most long actuation time of cloth power supply, to make distributed power source preferably play benefit to try one's best to avoid it from moving back in voltage pulsation Go out operation, it is necessary to higher controlled level comprehensive utilization power distribution network controllable elements all the time maintenance voltage in normal range (NR), or The time of limitation voltage pulsation is no more than most long actuation time.But medium voltage distribution network for cost of investment consider, it is few Reactive power compensator and voltage regulating device are configured on feeder line；The current automatization level of another aspect medium voltage distribution network is not high, Three distant ratios are relatively low, do not have observability, and many effective control strategies can not all be implemented because of no Data safeguard.
At present, following three kinds of methods are primarily present to distribution network voltage control technology：
(1) distributing voltage controls, and is characterized in directly being controlled reactive apparatus based on information on the spot；
(2) the centralized voltage that starting point is reverted to voltage out-of-limit controls, and this voltage control strategy according to adopting in real time The value collected, it is extensive to carry out voltage out-of-limit that predetermined control flow is directly triggered by heuritic approach or certain control logic It is multiple.
(3) the centralized voltage using voltage optimization as starting point controls, and this control strategy according to collecting in real time Value, while the features such as considering network structure is taken into account, first unify the manner of execution of all control devices of output by certain algorithm, Followed by issuing for control command.
But three kinds of technologies all have suitable constraint at this stage, the control of distributing voltage is as based on information on the spot Voltage control mode after distributed power source access due to that can not consider that it is easy that voltage rise that distributed power source brings influences Cause to malfunction.The centralized voltage that starting point is reverted to voltage out-of-limit controls, and operating dead zone scope is difficult to select.Sensitivity Too high that equipment can be caused to occur to shake repeatedly, dead zone range setting is excessive, and part intermittent energy will be caused short caused by fluctuating When voltage out-of-limit situations such as can not make a response in time.Centralized voltage using voltage optimization as starting point controls needs to add biography Sensor, remote control, arrangement communication network, while to ensure the reliability of SCADA channels, in the relatively low medium voltage distribution network of three distant ratios Implementation has suitable difficulty, so as to increase control cost to a great extent.
The content of the invention
The present invention is directed to above-mentioned problems of the prior art, proposes a kind of layering based on equivalent voltage landing index Voltage control system and method, power distribution network is carried out using equivalent voltage landing index to be layered voltage control, easily realizes, controls essence Degree is high, and cost is low.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions：
The present invention provides a kind of Hierarchical Voltage Control System based on equivalent voltage landing index, and it includes：This ground voltage Controller and regional coordination voltage controller, the local voltage controller is towards wall scroll feeder line, the regional coordination voltage Controller influences all feeder lines of the transformer station subordinate towards transformer station's level；
The local voltage controller includes voltage estimation unit, equivalent voltage landing indicator calculating unit and local tune Save unit；
The voltage estimation unit is used for the real-time measurement for gathering the separated region that the local voltage controller is managed Amount, according to this estimated voltage limit value；
The equivalent voltage landing indicator calculating unit is used to calculate the marker space that the local voltage controller is managed The equivalent voltage landing index in domain；
The local adjustment unit is used to judge whether have voltage to exceed voltage limits preset range in the separated region, when When voltage surmounts the upper limit of voltage limits, what the local adjustment unit was used to control in the separated region that it is managed idle sets It is standby to recover voltage, sent if voltage recovers failure to the regional coordination voltage controller and assist control data order；When When voltage surmounts the lower limit of the voltage limits, the local adjustment unit be used for judge in its separated region managed etc. Imitate whether voltage landing index is in the preset range of the voltage limits, if in preset range, control it to be managed Reactive apparatus in the separated region of reason recover voltage, if being in outside preset range, the separated region for controlling it to be managed Interior reactive apparatus recover voltage, or control the reactive apparatus in the separated region that it is managed and outside separated region to make electricity Pressure is recovered, and is sent if voltage recovers failure to the regional coordination voltage controller and assists control data order；
The regional coordination voltage controller is used to receive the assistance control data order that the local adjustment unit is sent, And for calculating the gear of ULTC after assistance control data order is received, so that in all separated regions Magnitude of voltage is all located in the preset range of the voltage limits.
It is preferred that when voltage surmounts the upper limit of voltage limits, the local voltage controller is used to control it to be managed Separated region in reactive apparatus make voltage recover be specially：The local voltage controller is managed for cutting off it successively Separated region in reactive apparatus until voltage recover；
When voltage surmounts the lower limit of the voltage limits, the local voltage controller is used for point for judging that it is managed Whether the equivalent voltage landing index in septal area domain is in the preset range of the voltage limits, if in preset range, Then control the reactive apparatus in the separated region that it is managed to recover voltage, if outside preset range, control it to be managed Reactive apparatus in the separated region of reason and outside separated region make voltage recover be specially：The local voltage controller is used for Judge whether the equivalent voltage landing index in its separated region managed is in the preset range of the voltage limits, if In preset range, then the reactive apparatus put into successively in the separated region that it is managed are until voltage recovers, if in pre- If outside scope, then all reactive apparatus for putting into the separated region that it is managed, and its marker space managed is put into successively Overseas reactive apparatus are until voltage recovers.
It is preferred that the upper limit of the voltage limits goes out for the distributed power source point in the separated region and transformer Voltage max in mouth node, the lower limit of the voltage limits is the minimum voltage likelihood value in the separated region.
It is preferred that the separated region includes：Single port region and the class of dual-port region two, in two class separated regions most The calculation formula of small voltage likelihood value is：
For the single port region：
Wherein, P1For the active power in single port region, Q1For the reactive power in single port region, U1For single port region Voltage measurements；R is circuit all-in resistance in single port region, and X is the total reactance value of circuit in single port region；
For the dual-port region：
Wherein, P1′、P2' respectively represent dual-port region both ends active power, Q1′、Q2' dual-port region is represented respectively The reactive power at both ends, U1′、U2' respectively represent dual-port region both ends voltage measurements, R ' be dual-port region in circuit All-in resistance, X ' are the total reactance value of circuit in dual-port region.
It is preferred that the equivalent voltage landing index is used to weigh the reactive apparatus adjustability in separated region, its Calculation formula is：
For the single port region：
Qmr=Q1-Qremain；
Wherein, QmrFor the idle theoretical limit capacity in single port region, QremainTo be remaining idle in single port region Capacity；
For the dual-port region：
Wherein, Qmr1, Qmr2The idle theoretical limit capacity at the both ends respectively in dual-port region, Qremain' it is dual-port Remaining reactive capability in region.
The present invention also provides a kind of layering voltage control method based on equivalent voltage landing index, and it includes following step Suddenly：
S11：Local voltage controller gathers the real-time amount measurement of its separated region managed, is limited according to this estimated voltage It is worth and calculates equivalent voltage landing index, judges whether that voltage occur surmounts voltage limits, if voltage occur surmounts the voltage The upper limit of limit value, then step S12 is transferred to, if there is the lower limit that voltage surmounts the voltage limits, is transferred to step S13；
S12：The local voltage controller controls the reactive apparatus in the separated region that it is managed to recover voltage, if Voltage recovers failure and then sends assistance control data order to regional coordination voltage controller, is transferred to step S14；
S13：The local voltage controller judge in its separated region managed equivalent voltage landing index whether In preset range in the voltage limits, if in the preset range, the nothing in the separated region that it is managed is controlled Work(equipment recovers voltage, if outside the preset range, controls the reactive apparatus in the separated region that it is managed to make voltage Recover, or control the reactive apparatus in the separated region that it is managed and outside separated region to recover voltage, if voltage recovers Failure then sends to regional coordination voltage controller and assists control data order, is transferred to step S14；
S14：The regional coordination voltage controller receives the assistance control data life that the local voltage controller is sent Make, and the gear of ULTC is calculated after assistance control data order is received, so that in all separated regions Magnitude of voltage is all located in the preset range of the voltage limits.
It is preferred that the step S12 is specially：The local voltage controller is used to cut off its separation managed successively Reactive apparatus in region are until voltage recovery, sends to regional coordination voltage controller if voltage recovers failure and assist to control Request command, it is transferred to step S14；
The step S13 is specifically included：
S131：The local voltage controller judge in its separated region managed equivalent voltage landing index whether In preset range in the voltage limits, if in preset range, put into successively in the separated region that it is managed Reactive apparatus until voltage recovers, if outside the preset range, be transferred to step S132；
S132：All reactive apparatus that the local voltage controller control is put into the separated region that it is managed, if Voltage does not recover, is transferred to step S133；
S133：Reactive apparatus that the local voltage controller control is put into outside the separated region that it is managed successively until Voltage recovers, and is sent if voltage recovers failure to regional coordination voltage controller and assists control data order.
It is preferred that the upper limit of the voltage limits goes out for the distributed power source point in the separated region and transformer Voltage max in mouth node, the lower limit of the voltage limits is the minimum voltage likelihood value in the separated region.
It is preferred that the separated region includes：Single port region and the class of dual-port region two, in two class separated regions most The calculation formula of small voltage likelihood value is：
For the single port region：
Wherein, P1For the active power in single port region, Q1For the reactive power in single port region, U1For single port region Voltage measurements；R is circuit all-in resistance in single port region, and X is the total reactance value of circuit in single port region；
For the dual-port region：
Wherein, P1′、P2' respectively represent dual-port region both ends active power, Q1′、Q2' dual-port region is represented respectively The reactive power at both ends, U1′、U2' respectively represent dual-port region both ends voltage measurements, R ' be dual-port region in circuit All-in resistance, X ' are the total reactance value of circuit in dual-port region.
It is preferred that the equivalent voltage landing index is used to weigh the reactive apparatus adjustability in separated region, its Calculation formula is：
For the single port region：
Qmr=Q1-Qremain；
Wherein, QmrFor the idle theoretical limit capacity in single port region, QremainTo be remaining idle in single port region Capacity；
For the dual-port region：
Wherein, Qmr1、Qmr2The idle theoretical limit capacity at the both ends respectively in dual-port region, Qremain' it is dual-port Remaining reactive capability in region.
Compared to prior art, the present invention has advantages below：
(1) Hierarchical Voltage Control System and method provided by the invention based on equivalent voltage landing index, it is contemplated that match somebody with somebody The characteristics of power network considerable measuring point deficiency, voltage out-of-limit is recovered by hierarchical control framework；Formed and controlled with this ground voltage Device, regional coordination voltage controller control for the layering voltage of representative, based on equivalent voltage landing index, comprehensively utilize power distribution network Middle controllable resources：Distributed power source, reactive power compensator, controllable load and adjustable transformer etc. are idle, and control device is realized soon Fast, efficient distribution network voltage control；Compared with traditional control method, the present invention is it is possible to prevente effectively from voltage control needs to add If the problem of control cost caused by sensor, remote control, arrangement communication network etc. improves；
(2) present invention carries out voltage out-of-limit recovery, dummy-node voltage in a hierarchical manner using equivalent voltage landing index The use of landing index can effectively improve voltage out-of-limit and recover efficiency, be completed as far as possible using the nearer reactive source of distance more point of accumulation Voltage recovers, and avoids energy loss caused by conveying idle over long distances；Simultaneously when relatively high power fluctuation occurs, the index is utilized Can be with accelerating potential resume speed, avoiding reactive source, actuation time long causes distributed power source out of service successively；
(3) present invention is interacted by local voltage controller, regional coordination voltage controller so that voltage out-of-limit recovers spirit Activity dramatically increases, when the secondary enlarging of power distribution network, it is only necessary in newly-increased distributed power source or reactive apparatus to the control of this ground voltage The line of device processed, it can conveniently realize device upgrade.
Certainly, any product for implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Brief description of the drawings
Embodiments of the present invention are described further below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of the Hierarchical Voltage Control System based on equivalent voltage landing index of embodiments of the invention Figure；
Fig. 2 is the structure chart of the power distribution network of embodiments of the invention；
Fig. 3 is the flow chart for being layered voltage control method of the index of being landed based on equivalent voltage of embodiments of the invention.
Label declaration：1- locals voltage controller, 2- regional coordination voltage controllers；
11- voltage estimation units, 12- equivalent voltages landing indicator calculating unit, 13- locals adjustment unit.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation Example.
With reference to Fig. 1-Fig. 2, the Hierarchical Voltage Control System based on equivalent voltage landing index of the present invention is carried out in detail Description, its structural representation is as shown in figure 1, it includes：Local voltage controller 1 and regional coordination voltage controller 2, it is local Voltage controller 1 coordinates voltage controller 2 towards transformer station's level, influences all feedbacks of transformer station subordinate towards wall scroll feeder line Line.The distribution net work structure figure that changes control system is installed as shown in Fig. 2 the four-headed arrow in Fig. 2 represents that mutual information interacts, Local voltage controller 1 and regional coordination voltage controller 2 cooperate, and complete to be based on limited measurement from power distribution network aspect The distribution network voltage of amount transfinites efficient recovery.Wherein, local voltage controller 1 includes：Voltage estimation unit 11, equivalent electric pressure drop Fall indicator calculating unit 12 and local adjustment unit 13, voltage estimation unit 11 is used for voltage estimation unit and is used to gather local The real-time amount measurement for the separated region that voltage controller is managed, according to this estimated voltage limit value；Equivalent voltage landing index meter Calculate the equivalent voltage landing index that unit 12 is used to calculate the separated region that local voltage controller is managed；Local adjustment unit 13 are used to judge whether have voltage to exceed voltage limits preset range in the separated region, when voltage surmounts the upper limit of voltage limits When, the reactive apparatus in separated region that local adjustment unit 13 is used to control it to be managed recover voltage, if voltage recovers Failure then sends to regional coordination voltage controller and assists control data order；When voltage surmounts the lower limit of voltage limits, this Whether the equivalent voltage landing index that ground adjustment unit is used to judge in its separated region managed is in the voltage limits Preset range in, if in the preset range, control the reactive apparatus in the separated region that it is managed to recover voltage, If outside the preset range, the reactive apparatus in the separated region that it is managed are controlled to recover voltage, or control it to be managed Reactive apparatus in the separated region of reason and outside separated region recover voltage, to regional coordination electricity if voltage recovers failure Pressure controller, which is sent, assists control data order；Regional coordination voltage controller is used to receive the assistance that local adjustment unit is sent Control data order, and for calculating the gear of ULTC after assistance control data order is received, so that institute There is the magnitude of voltage in separated region to be all located in the preset range of voltage limits.
In preferred embodiment, the specific adjusting method of local adjustment unit 13 is：When voltage surmounts the upper limit of voltage limits When, local adjustment unit is used to cut off the reactive apparatus in the separated region that it is managed successively until voltage recovers；Work as voltage When surmounting the lower limit of voltage limits, the equivalent voltage landing that local adjustment unit is used to judge in its separated region managed refers to Whether mark is in the preset range of voltage limits, if in preset range, puts into its separated region managed successively Interior reactive apparatus are until voltage recovery, if outside preset range, being whether there is in the separated region that it is managed put into Work(equipment, and the reactive apparatus put into successively outside the separated region that it is managed are until voltage recovers.
In the present embodiment, voltage estimation unit uses separated region power distribution network method of estimation, measures and obtains according to real-time amount Power distribution network is divided into some continuous separated regions by point, and the upper limit of voltage limits is where the distributed power source in the separated region Voltage max in point and transformer outlet node, the lower limit of voltage limits is the minimum voltage likelihood in the separated region Value.
In preferred embodiment, real-time amount measurement includes the active power of each distributed power source point in power distribution network, idle Power meter voltage measurements etc..
In preferred embodiment, separated region includes：Single port region and the class of dual-port region two, in two class separated regions The calculation formula of minimum voltage likelihood value is：
For single port region：
Wherein, P1For the active power in single port region, Q1For the reactive power in single port region, U1For single port region Voltage measurements；R is circuit all-in resistance in single port region, and X is the total reactance value of circuit in single port region；
For dual-port region：
Wherein, P1′、P2' respectively represent dual-port region both ends active power, Q1′、Q2' dual-port region is represented respectively The reactive power at both ends, U1′、U2' respectively represent dual-port region both ends voltage measurements, R ' be dual-port region in circuit All-in resistance, X ' are the total reactance value of circuit in dual-port region.
Equivalent voltage landing index estimates the remaining reactive capability in the separated region using reactive source output, so as to calculate The voltage level of circuit when the reactive power in separated region reaches maximum；The index is mainly used in weighing in separated region Reactive apparatus adjustability, so as to improve control efficiency, its calculation formula is：
For single port region：
Qmr=Q1-Qremain；
Wherein, QmrFor the idle theoretical limit capacity in single port region, QremainTo be remaining idle in single port region Capacity；
For dual-port region：
Wherein, Qmr1、Qmr2The idle theoretical limit capacity at the both ends respectively in dual-port region, Qremain' it is dual-port Remaining reactive capability in region.
As seen from the above description：Equivalent voltage landing index proposed by the present invention is to ensure that minimum voltage estimation is seemingly in region Right value can reach the normal fully non-comparison condition of voltage by the regulation of area's device within the domain, so now can be by judging to get over Whether point of accumulation affiliated area equivalent voltage landing index determines reactive apparatus start-up process in voltage limits preset range.If Equivalent voltage landing index is in voltage limits preset range, then can ensure to recover voltage by the regulation of area's device within the domain Normally, so selection puts into reactive apparatus in separated region where should getting over point of accumulation successively until voltage recovery, this control mode Voltage out-of-limit can be effectively improved and recover efficiency, voltage is completed using the nearer reactive source of distance more point of accumulation as far as possible and recover, avoid Energy loss caused by conveying idle over long distances；If outside preset range, it cannot be guaranteed that complete using reactive apparatus in region Recover into voltage, cause distributed power source out of service in order to avoid reactive apparatus successively actuation time are long, direct plunge into this More all reactive apparatus of separated region where point of accumulation, and the outer reactive apparatus of separated region are put into successively until voltage recovery, regulation Failure then sends to regional coordination voltage controller 2 and assists control data order.Regional coordination voltage controller 2 is receiving association ULTC action command is calculated after helping request command, coordinates the local voltage controller 1 to complete voltage and coordinates control System, makes all node voltage values of power distribution network be located in required preset range.
With reference to Fig. 3, the layering voltage control method based on equivalent voltage landing index of the present invention is described in detail, Fig. 3 is its flow chart, and it comprises the following steps：
S11：Local voltage controller obtains real-time amount by RTU and measured, and according to this estimated voltage level and calculates equivalent Voltage landing index, judge whether that voltage occur surmounts voltage limits, if there is the upper limit that voltage surmounts the voltage limits, Step S12 is transferred to, if there is the lower limit that voltage surmounts the voltage limits, is transferred to step S13；
S12：Local voltage controller controls the reactive apparatus in the separated region that it is managed to recover voltage, if voltage Recover failure and then send assistance control data order to regional coordination voltage controller, be transferred to step S14；
S13：Local voltage controller judges whether the equivalent voltage landing index in its separated region managed is in In the preset range of the voltage limits, if in the preset range, control in the separated region that it is managed idle sets It is standby to recover voltage, if outside preset range, control the reactive apparatus in the separated region that it is managed to recover voltage, Or control the reactive apparatus in the separated region that it is managed and outside separated region to recover voltage, if voltage recovers failure Sent to regional coordination voltage controller and assist control data order, be transferred to step S14；
S14：Regional coordination voltage controller receives the assistance control data order that local voltage controller is sent, and is connecing Receive assist control data order after calculate ULTC gear so that magnitude of voltage all positions in all separated regions In in the preset range of voltage limits.
In the present embodiment, step S12 is specially：Local voltage controller is used to cut off its separated region managed successively Interior reactive apparatus are until voltage recovery, sends to regional coordination voltage controller if voltage recovers failure and assist control data Order, is transferred to step S14；
Step S13 is specifically included：
S131：Local voltage controller judges whether the equivalent voltage landing index in its separated region managed is in In the preset range of the voltage limits, if being in preset range, the nothing put into successively in the separated region that it is managed Work(equipment, if outside preset range, is transferred to step S132 until voltage recovery；
S132：All reactive apparatus that local voltage controller control is put into the separated region that it is managed, if voltage Do not recover, be transferred to step S133；
S133：The reactive apparatus that local voltage controller control is put into outside the separated region that it is managed successively are until voltage Recover, sent if voltage recovers failure to regional coordination voltage controller and assist control data order.
In summary, the present invention has considered the characteristics of power distribution network considerable measuring point deficiency, passes through hierarchical control framework pair Voltage out-of-limit is recovered；The layering voltage using local voltage controller, regional coordination voltage controller as representative is formed to control, Landed index based on equivalent voltage, comprehensive utilization Distributed Generation in Distribution System, reactive power compensator, controllable load and adjustable Transformer etc. is idle, and control device realizes quick, efficient distribution network voltage control.
Disclosed herein is only the preferred embodiments of the present invention, and this specification is chosen and specifically describes these embodiments, is It is not limitation of the invention to preferably explain the principle and practical application of the present invention.Any those skilled in the art The modifications and variations done in the range of specification, it all should fall in the range of the present invention protects.

Claims (6)

  1. A kind of 1. Hierarchical Voltage Control System based on equivalent voltage landing index, it is characterised in that including：This ground voltage controls Device and regional coordination voltage controller, the local voltage controller control towards wall scroll feeder line, the regional coordination voltage Device influences all feeder lines of the transformer station subordinate towards transformer station's level；
    It is single that the local voltage controller includes voltage estimation unit, equivalent voltage landing indicator calculating unit and local regulation Member；
    The voltage estimation unit is used for the real-time amount measurement for gathering the separated region that the local voltage controller is managed, root Estimated voltage limit value accordingly；
    The equivalent voltage landing indicator calculating unit is used to calculate the separated region that the local voltage controller is managed Equivalent voltage landing index；
    The local adjustment unit is used to judge whether have voltage to exceed voltage limits preset range in the separated region, works as voltage When surmounting the upper limit of voltage limits, the reactive apparatus in separated region that the local adjustment unit is used to control it to be managed make Voltage recovers, and is sent if voltage recovers failure to the regional coordination voltage controller and assists control data order；Work as voltage When surmounting the lower limit of the voltage limits, the local adjustment unit is used to judge the equivalent electric in its separated region managed Whether drop of pressure index is in the preset range of the voltage limits, if in preset range, controls what it was managed Reactive apparatus in separated region recover voltage, if outside the preset range, control in the separated region that it is managed Reactive apparatus recover voltage, or control the reactive apparatus in the separated region that it is managed and outside separated region to make voltage extensive It is multiple, sent if voltage recovers failure to the regional coordination voltage controller and assist control data order；
    The regional coordination voltage controller is used to receive the assistance control data order that the local adjustment unit is sent, and is used in combination In the gear that ULTC is calculated after assistance control data order is received, so that the voltage in all separated regions Value is all located in the preset range of the voltage limits；
    It is specially when voltage surmounts the upper limit of voltage limits：The local adjustment unit is used to cut off its point managed successively Reactive apparatus in septal area domain are until voltage recovery, sends to the regional coordination voltage controller if voltage recovers failure and assist Help control data order；
    It is specially when voltage surmounts the lower limit of the voltage limits：The local adjustment unit is used for point for judging that it is managed Whether the equivalent voltage landing index in septal area domain is in the preset range of the voltage limits, if in preset range, The reactive apparatus then put into successively in the separated region that it is managed are until voltage recovery, if outside preset range, puts into All reactive apparatus in its separated region managed, put into successively if voltage does not recover outside the separated region that it is managed Reactive apparatus until voltage recover, if voltage recover failure if to the regional coordination voltage controller send assist control please Ask order；
    Described equivalent voltage landing index is used to weigh the reactive apparatus adjustability in separated region, described marker space Domain includes single port region and the class of dual-port region two, and equivalent voltage landing index calculation formula is：
    For the single port region：
    Qmr=Q1-Qremain；
    Wherein, P1For the active power in single port region, Q1For the reactive power in single port region, U1For the electricity in single port region Press measuring value；R be single port region in circuit all-in resistance, X be single port region in the total reactance value of circuit, QmrFor single port region Interior idle theoretical limit capacity, QremainFor the remaining reactive capability in single port region；
    For the dual-port region：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msup> <mi>J</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>g</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>J</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>g</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>P</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>ar</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>P</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>ar</mi> <mn>3</mn> </msub> <mo>=</mo> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>4</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>P</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>ar</mi> <mn>5</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> <mo>=</mo> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>-</mo> <mfrac> <mrow> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>Q</mi> <mrow> <mi>r</mi> <mi>e</mi> <mi>m</mi> <mi>a</mi> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>&amp;prime;</mo> </msup> </mrow> <mrow> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>-</mo> <mfrac> <mrow> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>Q</mi> <mrow> <mi>r</mi> <mi>e</mi> <mi>m</mi> <mi>a</mi> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>&amp;prime;</mo> </msup> </mrow> <mrow> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow>
    Wherein, P1′、P2' respectively represent dual-port region both ends active power, Q1′、Q2' dual-port region both ends are represented respectively Reactive power, U1′、U2' respectively represent dual-port region both ends voltage measurements, R ' be dual-port region in circuit it is always electric Resistance, X ' be dual-port region in the total reactance value of circuit, Qmr1, Qmr2The idle theoretical limit at the both ends respectively in dual-port region Capacity, Qremain' for the remaining reactive capability in dual-port region.
  2. 2. the Hierarchical Voltage Control System according to claim 1 based on equivalent voltage landing index, it is characterised in that institute The upper limits of voltage limits is stated as the voltage in the distributed power source point and transformer outlet node in the separated region most Big value, the lower limit of the voltage limits is the minimum voltage likelihood value in the separated region.
  3. 3. the Hierarchical Voltage Control System according to claim 2 based on equivalent voltage landing index, it is characterised in that two The calculation formula of minimum voltage likelihood value in class separated region is：
    For the single port region：
    For the dual-port region：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>Jg</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Jg</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>3</mn> </msub> <mo>=</mo> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mtable> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>4</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> <mtd> <mrow> <msub> <mi>Par</mi> <mn>5</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> </mrow> </mtd> </mtr> </mtable> </mtd> </mtr> </mtable> </mfenced> <mo>.</mo> </mrow>
  4. 4. a kind of control method of Hierarchical Voltage Control System as claimed in claim 1 based on equivalent voltage landing index, It is characterised in that it includes following steps：
    S11：Local voltage controller gathers the real-time amount measurement of its separated region managed, according to this estimated voltage limit value simultaneously Calculate equivalent voltage landing index, judge whether that voltage occur surmounts voltage limits preset range, if occur voltage surmount it is described The upper limit of voltage limits, then step S12 is transferred to, if there is the lower limit that voltage surmounts the voltage limits, is transferred to step S13；
    S12：The local voltage controller controls the reactive apparatus in the separated region that it is managed to recover voltage, if voltage Recover failure and then send assistance control data order to regional coordination voltage controller, be transferred to step S14；
    S13：The local voltage controller judges whether the equivalent voltage landing index in its separated region managed is in In the preset range of the voltage limits, if in the preset range, control in the separated region that it is managed idle sets It is standby to recover voltage, if outside preset range, control the reactive apparatus in the separated region that it is managed to recover voltage, Or control the reactive apparatus in the separated region that it is managed and outside separated region to recover voltage, if voltage recovers failure Sent to regional coordination voltage controller and assist control data order, be transferred to step S14；
    S14：The regional coordination voltage controller receives the assistance control data order that the local voltage controller is sent, and The gear of ULTC is calculated after assistance control data order is received, so that the magnitude of voltage in all separated regions It is all located in the preset range of the voltage limits；
    The step S12 is specially：The local voltage controller is used to cut off the nothing in the separated region that it is managed successively Work(equipment sends to regional coordination voltage controller if voltage recovers failure until voltage recovery and assists control data order, It is transferred to step S14；
    The step S13 is specifically included：
    S131：The local voltage controller judges whether the equivalent voltage landing index in its separated region managed is in In the preset range of the voltage limits, if being in preset range, the nothing put into successively in the separated region that it is managed Work(equipment, if outside preset range, is transferred to step S132 until voltage recovery；
    S132：All reactive apparatus that the local voltage controller control is put into the separated region that it is managed, if voltage Do not recover, be transferred to step S133；
    S133：The reactive apparatus that the local voltage controller control is put into outside the separated region that it is managed successively are until voltage Recover, sent if voltage recovers failure to regional coordination voltage controller and assist control data order；
    Described equivalent voltage landing index is used to weigh the reactive apparatus adjustability in separated region, described marker space Domain includes：Single port region and the class of dual-port region two, equivalent voltage landing index calculation formula are：
    For the single port region：
    Qmr=Q1-Qremain；
    Wherein, P1For the active power in single port region, Q1For the reactive power in single port region, U1For the electricity in single port region Press measuring value；R is circuit all-in resistance in single port region, and X is the total reactance value of circuit in single port region；QmrFor single port region Interior idle theoretical limit capacity, QremainFor the remaining reactive capability in single port region；
    For the dual-port region：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msup> <mi>J</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>g</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>J</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>g</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>P</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>ar</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>P</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>ar</mi> <mn>3</mn> </msub> <mo>=</mo> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>4</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>P</mi> <mo>&amp;prime;</mo> </msup> <msub> <mi>ar</mi> <mn>5</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>1</mn> </mrow> </msub> <mo>=</mo> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>-</mo> <mfrac> <mrow> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>Q</mi> <mrow> <mi>r</mi> <mi>e</mi> <mi>m</mi> <mi>a</mi> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>&amp;prime;</mo> </msup> </mrow> <mrow> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Q</mi> <mrow> <mi>m</mi> <mi>r</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>-</mo> <mfrac> <mrow> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>Q</mi> <mrow> <mi>r</mi> <mi>e</mi> <mi>m</mi> <mi>a</mi> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>&amp;prime;</mo> </msup> </mrow> <mrow> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow>
    Wherein, P1′、P2' respectively represent dual-port region both ends active power, Q1′、Q2' dual-port region both ends are represented respectively Reactive power, U1′、U2' respectively represent dual-port region both ends voltage measurements, R ' be dual-port region in circuit it is always electric Resistance, X ' be dual-port region in the total reactance value of circuit, Qmr1, Qmr2The idle theoretical limit at the both ends respectively in dual-port region Capacity, Qremain' for the remaining reactive capability in dual-port region.
  5. 5. the control method of the Hierarchical Voltage Control System according to claim 4 based on equivalent voltage landing index, its It is characterised by, the upper limit of the voltage limits is the distributed power source point and transformer outlet node in the separated region In voltage max, the lower limits of the voltage limits is the minimum voltage likelihood value in the separated region.
  6. 6. the control method of the Hierarchical Voltage Control System according to claim 5 based on equivalent voltage landing index, its It is characterised by, the calculation formula of the minimum voltage likelihood value in two class separated regions is：
    For the single port region：
    For the dual-port region：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>Jg</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Jg</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>1</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>2</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mrow> <mo>&amp;prime;</mo> <mn>2</mn> </mrow> </msup> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>3</mn> </msub> <mo>=</mo> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>R</mi> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <mi>X</mi> <mo>&amp;prime;</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mtable> <mtr> <mtd> <mrow> <msub> <mi>Par</mi> <mn>4</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>P</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> </mrow> </mtd> <mtd> <mrow> <msub> <mi>Par</mi> <mn>5</mn> </msub> <mo>=</mo> <msup> <msub> <mi>U</mi> <mn>1</mn> </msub> <mo>&amp;prime;</mo> </msup> <msup> <msub> <mi>Q</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <mo>+</mo> <msup> <msub> <mi>U</mi> <mn>2</mn> </msub> <mo>&amp;prime;</mo> </msup> <msub> <mi>Q</mi> <mn>1</mn> </msub> </mrow> </mtd> </mtr> </mtable> </mtd> </mtr> </mtable> </mfenced> <mo>.</mo> </mrow> 5
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