CN106208088B - The idle autocontrol method of region voltage and system for load-center substation - Google Patents
The idle autocontrol method of region voltage and system for load-center substation Download PDFInfo
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- CN106208088B CN106208088B CN201610589465.4A CN201610589465A CN106208088B CN 106208088 B CN106208088 B CN 106208088B CN 201610589465 A CN201610589465 A CN 201610589465A CN 106208088 B CN106208088 B CN 106208088B
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Classifications
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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
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- 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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Abstract
The invention discloses a kind of idle autocontrol method of the region voltage for load-center substation and system, method and step includes：Transient voltage support is provided by adjusting SVG；Detect this transformer station, adjacent substations voltage it is whether unqualified, if the voltage of this transformer station is unqualified the voltage of this transformer station is adjusted by adjusting SVG capacitive reactive power or inductive reactive power, voltage using adjacent substations if the voltage of adjacent substations is unqualified is used as control targe, estimate the voltage of adjacent substations, adjust SVG capacitive reactive power or inductive reactive power to adjust the voltage of adjacent substations, otherwise adjust SVG capacitive reactive power or inductive reactive power to adjust the idle level of circuit；System includes transient voltage support unit, our station adjustment unit, neighboring station adjustment unit, line adjustment unit.The present invention disclosure satisfy that the voltage power-less regulation of load-center substation is required, meets multiple control target call, gives full play to SCG advantages, improves utilization rate of equipment and installations.
Description
Technical field
The present invention relates to voltage and reactive power control technology, and in particular to a kind of region electricity for load-center substation
Idle autocontrol method and system are pressed, the voltage based on dynamic reactive compensation device and adjacent substations, which is estimated, realizes region electricity
Pressure is idle to be automatically controlled.
Background technology
The voltage power-less adjustment of power system has large effect to the Voltage Stability Level and reduction network loss of power network.At present
Voltage power-less is mainly adjusted by two ways, and one is that AVC systems are adjusted on province's tune/ground, to the whole network or the voltage power-less of part
Optimize calculating and control；Two be the VQC systems in station, and switching is carried out to the reactive apparatus of our station, to meet higher level's scheduling
It is required that.
Load-center substation is the pivot point of power system, summarizes multiple power supplys and interconnection, has accepted backbone with
Level power network, not only carries the requirement of voltage power-less regulation, and needs regulation our station idle if necessary to support adjacent power transformation
The voltage stood, needs rapid release maximum idle to support voltage when system voltage temporarily falls；When station is built with can be continuous
, it is necessary to will according to control during dynamic passive compensation equipment (hereinafter referred to as SVG, Static the Var Generator) of quick regulation
Ask and it is reasonably utilized.Because control targe and control require more, current province's tune/ground is adjusted in AVC systems or station
Comprehensive VQC systems certainly are more difficult to meet regulation and control requirement.
The content of the invention
The technical problem to be solved in the present invention：For the above mentioned problem of prior art, there is provided a kind of SVG in transformer station
Automatically controlled, realize that regulation, circuit Reactive-power control and transient state are estimated in the regulation of this transformer substation voltage, the voltage of adjacent substations
Voltage support, adjusts requirement with the voltage power-less for meeting load-center substation, disclosure satisfy that multiple control target call, give full play to
The advantage of dynamic passive compensation equipment, improves the idle side of automatically controlling of the region voltage for load-center substation of utilization rate of equipment and installations
Method and system.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of region voltage for load-center substation is idle autocontrol method, step includes：
1) transient voltage support is provided by adjusting SVG；
2) detect whether the voltage of this transformer station is unqualified, if the voltage of this transformer station is unqualified, with this transformer station
Voltage adjust the voltage of this transformer station as control targe, and by adjusting SVG capacitive reactive power or inductive reactive power, redirect
Perform step 2)；Otherwise, then execution step 3 is redirected)；
3) whether the voltage of detection adjacent substations is unqualified, if the voltage of adjacent substations is unqualified, with adjacent
The voltage of transformer station estimates the voltage of adjacent substations as control targe, adjusts SVG capacitive reactive power or inductive reactive power to adjust
The voltage of whole adjacent substations, redirects execution step 2)；Otherwise, it is idle as control targe using circuit, redirect execution step 4)；
4) adjust SVG capacitive reactive power or inductive reactive power to adjust the idle level of circuit, redirect execution step 2).
Preferably, the step 2) in adjust this transformer station voltage specifically refer to：By the voltage effective value of this transformer station
U0With the regulation upper limit U of the voltage of this transformer station of settingHWith regulation lower limit ULIt is compared, if voltage effective value U0It is more than
Adjust upper limit UH, then the inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage effective value U0Less than regulation lower limit UL,
The then capacitive reactive power output of control SVG increases designated magnitude.
Preferably, the step 3) in estimate adjacent substations voltage calculating function expression such as formula (1) shown in；
In formula (1), UxFor the voltage discreet value of adjacent substations, U0For the voltage of this transformer station, R is this transformer station and phase
Resistance between adjacent transformer station on interconnection, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this change
It is active on interconnection between power station and adjacent substations, Q to be idle on interconnection between this transformer station and adjacent substations,
Active P with flow into this transformer station be just, flow out this transformer station be it is negative, idle Q using flow into the perception of this transformer station as just, leave this
The perception of transformer station is negative.
Preferably, the step 3) in adjustment adjacent substations voltage specifically refer to：The voltage of adjacent substations is pre-
Valuation UxWith the regulation upper limit U of the voltage of this transformer station of settingHWith regulation lower limit ULIt is compared, if voltage discreet value Ux
More than regulation upper limit UH, then the inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage discreet value UxLess than under regulation
Limit UL, then the capacitive reactive power output of SVG increase designated magnitudes is controlled.
Preferably, the step 4) in adjustment circuit idle level specifically refer to：By the idle horizontal Q of circuitSWith set
The idle upper limit for permission that fixed circuit is idle is QHWith idle lower limit QLIt is compared, if the idle horizontal Q of circuitSMore than nothing
The work(upper limit is QH, then the capacitive reactive power output of SVG increase designated magnitudes is controlled, if the idle horizontal Q of circuitSUnder idle
Limit QL, then the inductive reactive power output of SVG increase designated magnitudes is controlled.
Preferably, the step 1) detailed step include：
1.1) voltage effective value is calculated using two-point method according to three-phase voltage sampled value, had using mean square root method calculating voltage
Valid value, and calculate the descending slope of voltage root mean square；
1.2) voltage transient lower limit U of the voltage effective value less than setting that two-point method is calculated is judgedLL, using mean square root method meter
Voltage transient lower limit U of the voltage effective value of calculation less than settingLL, voltage root mean square descending slope less than setting three bars of thresholding
The establishment situation of the condition of each in part, if having any two establishment in foregoing three conditions, judges the system electricity of this transformer station
Pressure is fallen, and the control direct amount of exports of SVG determines capacitive reactive power；
1.3) voltage transient upper limit U of the voltage effective value higher than setting that two-point method is calculated is judgedHH, using mean square root method meter
Voltage transient upper limit U of the voltage effective value of calculation higher than settingHH, voltage root mean square descending slope higher than setting three bars of thresholding
The establishment situation of the condition of each in part, if having any two establishment in foregoing three conditions, judges the system electricity of this transformer station
Pressure there occurs it is out-of-limit, control SVG directly export specified inductive reactive power.
The present invention also provides a kind of region voltage reactive automatic control system for load-center substation, including：
Transient voltage support unit, for providing transient voltage support by adjusting SVG；
Our station adjustment unit, detects whether the voltage of this transformer station is unqualified, if the voltage of this transformer station is unqualified,
Voltage using this transformer station adjusts this transformer station as control targe, and by adjusting SVG capacitive reactive power or inductive reactive power
Voltage, redirect execution our station adjustment unit；Otherwise, then execution neighboring station adjustment unit is redirected；
Neighboring station adjustment unit, for detecting whether the voltage of adjacent substations is unqualified, if the voltage of adjacent substations
It is unqualified, then using the voltage of adjacent substations as control targe, estimate the voltage of adjacent substations, adjust SVG capacitive without
Work(or inductive reactive power adjust the voltage of adjacent substations, redirect execution our station adjustment unit；Otherwise, it is used as control so that circuit is idle
Target processed, redirects execution line adjustment unit.
Preferably, the voltage that the our station adjustment unit adjusts this transformer station is specifically referred to：The voltage of this transformer station is had
Valid value U0With the regulation upper limit U of the voltage of this transformer station of settingHWith regulation lower limit ULIt is compared, if voltage effective value U0
More than regulation upper limit UH, then the inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage effective value U0Less than under regulation
Limit UL, then the capacitive reactive power output of SVG increase designated magnitudes is controlled.
Preferably, the neighboring station adjustment unit estimates calculating function expression such as formula (1) institute of the voltage of adjacent substations
Show；
In formula (1), UxFor the voltage discreet value of adjacent substations, U0For the voltage of this transformer station, R is this transformer station and phase
Resistance between adjacent transformer station on interconnection, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this change
It is active on interconnection between power station and adjacent substations, Q to be idle on interconnection between this transformer station and adjacent substations,
Active P with flow into this transformer station be just, flow out this transformer station be it is negative, idle Q using flow into the perception of this transformer station as just, leave this
The perception of transformer station is negative.
Preferably, the voltage of the neighboring station adjustment unit adjustment adjacent substations is specifically referred to：By the electricity of adjacent substations
Press discreet value UxWith the regulation upper limit U of the voltage of this transformer station of settingHWith regulation lower limit ULIt is compared, if voltage is estimated
Value UxMore than regulation upper limit UH, then the inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage discreet value UxLess than tune
Save lower limit UL, then the capacitive reactive power output of SVG increase designated magnitudes is controlled.
Preferably, the idle level of the line adjustment unit adjustment circuit is specifically referred to：By the idle horizontal Q of circuitS
The idle upper limit with the idle permission of circuit set is QHWith idle lower limit QLIt is compared, if the idle horizontal Q of circuitSGreatly
In the idle upper limit be QH, then the capacitive reactive power output of SVG increase designated magnitudes is controlled, if the idle horizontal Q of circuitSLess than nothing
Work(lower limit QL, then the inductive reactive power output of SVG increase designated magnitudes is controlled.
Preferably, the transient voltage support unit includes：
Calculation of characteristic parameters module, for calculating voltage effective value using two-point method according to three-phase voltage sampled value, using
Mean square root method calculates voltage effective value, and calculates the descending slope of voltage root mean square；
Fall judge module, for judging voltage transient lower limit U of the voltage effective value less than setting that two-point method is calculatedLL、
Voltage transient lower limit U of the voltage effective value less than setting calculated using mean square root methodLL, voltage root mean square descending slope be less than
The establishment situation of each condition in three conditions of thresholding is set, if there is any two establishment in foregoing three conditions, this is judged
The system voltage of transformer station is fallen, and the control direct amount of exports of SVG determines capacitive reactive power；
Out-of-limit judging module, for judging voltage transient upper limit U of the voltage effective value higher than setting that two-point method is calculatedHH、
Voltage transient upper limit U of the voltage effective value higher than setting calculated using mean square root methodHH, voltage root mean square descending slope be higher than
The establishment situation of each condition in three conditions of thresholding is set, if there is any two establishment in foregoing three conditions, this is judged
The system voltage of transformer station there occurs it is out-of-limit, control SVG directly export specified inductive reactive power.
The present invention has the advantage that for the idle autocontrol method tool of region voltage of load-center substation：
1st, the present invention is by step 1)~multiple control target 3) is according to priority realized, control hierarchy is clear, can meet
The regulation and control requirement of our station voltage power-less, can also be supported to neighboring station voltage；
2nd, the present invention realizes the combination of the control of voltage power-less stable state and transient state control, farthest improves voltage steady
It is qualitative.
3rd, the present invention is adjusted with step-type control mode when realizing multiple control target, it is to avoid adjusted repeatedly
Section vibration.
4th, the present invention improves the stabilization of judgement by multicriterion comprehensive descision voltage transient while quickly judging
Property；
The present invention is that the present invention is used for load-center substation for the region voltage reactive automatic control system of load-center substation
The idle autocontrol method of region voltage corresponding system completely, therefore equally also there is the present invention for load-center substation
The aforementioned advantages of region voltage is idle autocontrol method, therefore will not be repeated here.
Brief description of the drawings
Fig. 1 is the SVG main electrical scheme schematic diagrames of application present invention method.
Fig. 2 is the basic procedure schematic diagram of present invention method.
Fig. 3 is the voltage power-less thresholding schematic diagram in the embodiment of the present invention.
Embodiment
It is hereafter that the region voltage for by taking the SVG main electrical schemes shown in Fig. 1 as an example, being used for load-center substation to the present invention is idle certainly
Flowing control method is described in further detail.
As shown in Fig. 2 the present embodiment includes the step of being used for the region voltage idle autocontrol method of load-center substation：
1) transient voltage support is provided by adjusting SVG；
2) detect whether the voltage of this transformer station is unqualified, if the voltage of this transformer station is unqualified, with this transformer station
Voltage adjust the voltage of this transformer station as control targe, and by adjusting SVG capacitive reactive power or inductive reactive power, redirect
Perform step 2)；Otherwise, then execution step 3 is redirected)；
3) whether the voltage of detection adjacent substations is unqualified, if the voltage of adjacent substations is unqualified, with adjacent
The voltage of transformer station estimates the voltage of adjacent substations as control targe, adjusts SVG capacitive reactive power or inductive reactive power to adjust
The voltage of whole adjacent substations, redirects execution step 2)；Otherwise, it is idle as control targe using circuit, redirect execution step 4)；
4) adjust SVG capacitive reactive power or inductive reactive power to adjust the idle level of circuit, redirect execution step 2).
In the present embodiment, step 2) in adjust the voltage of this transformer station and specifically refer to：By the voltage effective value of this transformer station
U0With the regulation upper limit U of the voltage of this transformer station of settingHWith regulation lower limit ULIt is compared, if voltage effective value U0It is more than
Adjust upper limit UH, then the inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage effective value U0Less than regulation lower limit UL,
The then capacitive reactive power output of control SVG increases designated magnitude.It can be seen from described above, work as U0>UHWhen, SVG increase certain amplitudes
Inductive reactive power output, i.e. Q'SVGx=QSVG+ △ Q, work as U0<ULWhen, the capacitive reactive power output of SVG increase certain amplitudes, i.e.,
Q'SVGx=QSVG- △ Q, wherein, QSVGIt is last time SVG idle output, Q'SVGxIt is this secondary control SVG idle reference, △ Q are
Idle increment, can use the percentage of SVG rated capacities, if perception is just, capacitive is negative.Regulating time interval and idle increment width
Degree can be set, and in the present embodiment, regulating time interval is set to 1 cycle, and idle incremental amplitude is set to the 5% of SVG rated capacities.
In the present embodiment, the step 3) in estimate adjacent substations voltage calculating function expression such as formula (1) institute
Show；
In formula (1), UxFor the voltage discreet value of adjacent substations, U0For the voltage of this transformer station, R is this transformer station and phase
Resistance between adjacent transformer station on interconnection, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this change
It is active on interconnection between power station and adjacent substations, Q to be idle on interconnection between this transformer station and adjacent substations,
Active P with flow into this transformer station be just, flow out this transformer station be it is negative, idle Q using flow into the perception of this transformer station as just, leave this
The perception of transformer station is negative.Line impedance data can give in advance, and the Real-time Power Flow data of circuit may be from comprehensive from backstage, pass through
Communications give SVG controllers.Multiple neighboring station voltages can be estimated and reactive requirement analysis simultaneously.
In the present embodiment, step 3) in the voltage of adjustment adjacent substations specifically refer to：The voltage of adjacent substations is pre-
Valuation UxWith the regulation upper limit U of the voltage of this transformer station of settingHWith regulation lower limit ULIt is compared, if voltage discreet value Ux
More than regulation upper limit UH, then the inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage discreet value UxLess than under regulation
Limit UL, then the capacitive reactive power output of SVG increase designated magnitudes is controlled.Work as Ux>UHWhen, SVG increases the inductive reactive power of certain amplitude
Output, i.e. Q'SVGx=QSVG+△Q；Work as Ux<ULWhen, the capacitive reactive power output of SVG increase certain amplitudes, i.e. Q'SVGx=QSVG-△
Q, wherein, QSVGIt is last time SVG idle output, Q'SVGxIt is this secondary control SVG idle reference, △ Q are idle increment, be can use
The percentage of SVG rated capacities, if perception is just, capacitive is negative.Regulating time interval and idle incremental amplitude can be set, this implementation
In example, regulating time interval is set to 2 cycles, and idle incremental amplitude is set to the 5% of SVG rated capacities.
In the present embodiment, step 4) in the idle level of adjustment circuit specifically refer to：By the idle horizontal Q of circuitSWith set
The idle upper limit for permission that fixed circuit is idle is QHWith idle lower limit QLIt is compared, if the idle horizontal Q of circuitSMore than nothing
The work(upper limit is QH, then the capacitive reactive power output of SVG increase designated magnitudes is controlled, if the idle horizontal Q of circuitSUnder idle
Limit QL, then the inductive reactive power output of SVG increase designated magnitudes is controlled.Work as QS>QHWhen, SVG increases the capacitive reactive power of certain amplitude
Output, i.e. Q'SVGx=QSVG-△Q；Work as QS<QLWhen, the inductive reactive power output of SVG increase certain amplitudes, i.e. Q'SVGx=QSVG+△
Q, wherein, QSVGIt is last time SVG idle output, Q'SVGxIt is this secondary control SVG idle reference, △ Q are idle increment, be can use
The percentage of SVG rated capacities, if perception is just, capacitive is negative.Regulating time interval and idle incremental amplitude can be set, this implementation
Example regulating time interval is set to 2 seconds, and idle incremental amplitude is set to the 10% of SVG rated capacities.
In the present embodiment, step 1) detailed step include：
1.1) voltage effective value is calculated using two-point method according to three-phase voltage sampled value, had using mean square root method calculating voltage
Valid value, and calculate the descending slope of voltage root mean square；
1.2) voltage transient lower limit U of the voltage effective value less than setting that two-point method is calculated is judgedLL, using mean square root method meter
Voltage transient lower limit U of the voltage effective value of calculation less than settingLL, voltage root mean square descending slope less than setting three bars of thresholding
The establishment situation of the condition of each in part, if having any two establishment in foregoing three conditions, judges the system electricity of this transformer station
Pressure is fallen, and the control direct amount of exports of SVG determines capacitive reactive power；
1.3) voltage transient upper limit U of the voltage effective value higher than setting that two-point method is calculated is judgedHH, using mean square root method meter
Voltage transient upper limit U of the voltage effective value of calculation higher than settingHH, voltage root mean square descending slope higher than setting three bars of thresholding
The establishment situation of the condition of each in part, if having any two establishment in foregoing three conditions, judges the system electricity of this transformer station
Pressure there occurs it is out-of-limit, control SVG directly export specified inductive reactive power.
It is above-mentioned 1.1)~1.3) regulation SVG provide that transient voltage support is preferential in any condition to be performed, can be with most fast
Speed supports voltage stabilization.In the present embodiment, the regulation upper limit U of the voltage of this transformer station is setHThan voltage transient upper limit UHHIt is small,
Set the regulation lower limit U of the voltage of this transformer stationLThan voltage transient lower limit ULLGreatly, it is with the idle upper limit of the idle permission of circuit
QHWith idle lower limit QLRelation difference it is as shown in Figure 3.
In summary, the present embodiment according to priority realizes multiple control target, is preferentially controlled when this transformer substation voltage is unqualified
Our station voltage processed, using the neighboring station voltage estimated based on Line Flow and impedance as control targe when our station voltage is qualified, our station and
Idle for control targe with circuit when neighboring station voltage is all qualified, the transient voltage of this transformer station is controlled prior to any of the above described mesh
Mark, and by increasing SVG capacitive reactive power or reducing inductive reactive power to improve voltage, by the inductive reactive power or drop that increase SVG
Low capacitive reactive power is to reduce voltage；Multicriterion is used quickly to judge to fall to improve the response speed of transient voltage support, this
Embodiment clear layer, can meet our station voltage and idle regulation and control requirement, neighboring station voltage can also be supported, and
The control of voltage power-less stable state and transient state control have been taken into account, making full use of for dynamic passive compensation equipment SVG is realized.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of region voltage for load-center substation is idle autocontrol method, it is characterised in that step includes：
1) transient voltage support is provided by adjusting SVG；
2) detect whether the voltage of this transformer station is unqualified, if the voltage of this transformer station is unqualified, with the electricity of this transformer station
Pressure adjusts the voltage of this transformer station as control targe, and by adjusting SVG capacitive reactive power or inductive reactive power, redirects execution
Step 2)；Otherwise, then execution step 3 is redirected)；
3) whether the voltage of detection adjacent substations is unqualified, if the voltage of adjacent substations is unqualified, with adjacent power transformation
The voltage stood estimates the voltage of adjacent substations as control targe, adjusts SVG capacitive reactive power or inductive reactive power to adjust phase
The voltage of adjacent transformer station, redirects execution step 2)；Otherwise, it is idle as control targe using circuit, redirect execution step 4)；
4) adjust SVG capacitive reactive power or inductive reactive power to adjust the idle level of circuit, redirect execution step 2).
2. the region voltage according to claim 1 for load-center substation is idle autocontrol method, it is characterised in that
The step 2) in adjust this transformer station voltage specifically refer to：By the voltage effective value U of this transformer station0With this power transformation of setting
The regulation upper limit U for the voltage stoodHWith regulation lower limit ULIt is compared, if voltage effective value U0More than regulation upper limit UH, then control
The inductive reactive power output of SVG increase designated magnitudes, if voltage effective value U0Less than regulation lower limit UL, then SVG increases are controlled to specify
The capacitive reactive power output of amplitude.
3. the region voltage according to claim 1 for load-center substation is idle autocontrol method, it is characterised in that
The step 3) in estimate adjacent substations voltage calculating function expression such as formula (1) shown in；
In formula (1), UxFor the voltage discreet value of adjacent substations, U0For the voltage of this transformer station, R is this transformer station and adjacent change
Resistance between power station on interconnection, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this transformer station
Active on interconnection between adjacent substations, Q is active to be idle on interconnection between this transformer station and adjacent substations
P with flow into this transformer station be just, flow out this transformer station be it is negative, idle Q using flow into the perception of this transformer station as just, leave this power transformation
The perception stood is negative.
4. the region voltage according to claim 1 for load-center substation is idle autocontrol method, it is characterised in that
The step 3) in adjustment adjacent substations voltage specifically refer to：By the voltage discreet value U of adjacent substationsxWith the sheet of setting
The regulation upper limit U of the voltage of transformer stationHWith regulation lower limit ULIt is compared, if voltage discreet value UxMore than regulation upper limit UH, then
The inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage discreet value UxLess than regulation lower limit UL, then SVG increases are controlled
The capacitive reactive power output of designated magnitude.
5. the region voltage according to claim 1 for load-center substation is idle autocontrol method, it is characterised in that
The step 4) in adjustment circuit idle level specifically refer to：By the idle horizontal Q of circuitSWith the idle permission of circuit of setting
The idle upper limit be QHWith idle lower limit QLIt is compared, if the idle horizontal Q of circuitSIt is Q more than the idle upper limitH, then control
The capacitive reactive power output of SVG increase designated magnitudes, if the idle horizontal Q of circuitSLess than idle lower limit QL, then SVG increases are controlled
The inductive reactive power output of designated magnitude.
6. the idle side of automatically controlling of the region voltage for load-center substation according to any one in Claims 1 to 5
Method, it is characterised in that the step 1) detailed step include：
1.1) it is effective using two-point method calculating voltage effective value, using mean square root method calculating voltage according to three-phase voltage sampled value
Value, and calculate the descending slope of voltage root mean square；
1.2) voltage transient lower limit U of the voltage effective value less than setting that two-point method is calculated is judgedLL, calculated using mean square root method
Voltage transient lower limit U of the voltage effective value less than settingLL, voltage root mean square descending slope less than setting three conditions of thresholding in
The establishment situation of each condition, if having any two establishment in foregoing three conditions, judges the system voltage hair of this transformer station
Give birth to and fallen, the control direct amount of exports of SVG determines capacitive reactive power；
1.3) voltage transient upper limit U of the voltage effective value higher than setting that two-point method is calculated is judgedHH, calculated using mean square root method
Voltage transient upper limit U of the voltage effective value higher than settingHH, voltage root mean square descending slope higher than setting three conditions of thresholding in
The establishment situation of each condition, if having any two establishment in foregoing three conditions, judges the system voltage hair of this transformer station
Give birth to out-of-limit, control SVG directly exports specified inductive reactive power.
7. a kind of region voltage reactive automatic control system for load-center substation, it is characterised in that including：
Transient voltage support unit, for providing transient voltage support by adjusting SVG；
Our station adjustment unit, detects whether the voltage of this transformer station is unqualified, if the voltage of this transformer station is unqualified, with this
The voltage of transformer station adjusts the electricity of this transformer station as control targe, and by adjusting SVG capacitive reactive power or inductive reactive power
Pressure, redirects execution our station adjustment unit；Otherwise, then execution neighboring station adjustment unit is redirected；
Neighboring station adjustment unit, for detecting whether the voltage of adjacent substations is unqualified, if the voltage of adjacent substations does not conform to
Lattice, then using the voltage of adjacent substations as control targe, estimate the voltage of adjacent substations, adjust SVG capacitive reactive power or
Inductive reactive power adjusts the voltage of adjacent substations, redirects execution our station adjustment unit；Otherwise, it is used as control mesh so that circuit is idle
Mark, redirects execution line adjustment unit；
Line adjustment unit, the idle level of circuit is adjusted for adjusting SVG capacitive reactive power or inductive reactive power.
8. the region voltage reactive automatic control system according to claim 7 for load-center substation, it is characterised in that
The voltage that the our station adjustment unit adjusts this transformer station is specifically referred to：By the voltage effective value U of this transformer station0With the sheet of setting
The regulation upper limit U of the voltage of transformer stationHWith regulation lower limit ULIt is compared, if voltage effective value U0More than regulation upper limit UH, then
The inductive reactive power output of SVG increase designated magnitudes is controlled, if voltage effective value U0Less than regulation lower limit UL, then SVG increases are controlled
The capacitive reactive power output of designated magnitude.
9. the region voltage reactive automatic control system according to claim 7 for load-center substation, it is characterised in that
The neighboring station adjustment unit is estimated shown in the calculating function expression such as formula (1) of the voltage of adjacent substations；
In formula (1), UxFor the voltage discreet value of adjacent substations, U0For the voltage of this transformer station, R is this transformer station and adjacent change
Resistance between power station on interconnection, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this transformer station
Active on interconnection between adjacent substations, Q is active to be idle on interconnection between this transformer station and adjacent substations
P with flow into this transformer station be just, flow out this transformer station be it is negative, idle Q using flow into the perception of this transformer station as just, leave this power transformation
The perception stood is negative.
10. the region voltage reactive automatic control system according to claim 7 for load-center substation, its feature exists
In the transient voltage support unit includes：
Calculation of characteristic parameters module, for calculating voltage effective value, using square using two-point method according to three-phase voltage sampled value
Root method calculates voltage effective value, and calculates the descending slope of voltage root mean square；
Fall judge module, for judging voltage transient lower limit U of the voltage effective value less than setting that two-point method is calculatedLL, use
Voltage transient lower limit U of the voltage effective value that mean square root method is calculated less than settingLL, voltage root mean square descending slope less than setting
The establishment situation of each condition in three conditions of thresholding, if having any two establishment in foregoing three conditions, judges this power transformation
The system voltage stood is fallen, and the control direct amount of exports of SVG determines capacitive reactive power；
Out-of-limit judging module, for judging voltage transient upper limit U of the voltage effective value higher than setting that two-point method is calculatedHH, use
Voltage transient upper limit U of the voltage effective value that mean square root method is calculated higher than settingHH, voltage root mean square descending slope higher than setting
The establishment situation of each condition in three conditions of thresholding, if having any two establishment in foregoing three conditions, judges this power transformation
The system voltage stood there occurs it is out-of-limit, control SVG directly export specified inductive reactive power.
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