CN106208088A - The idle autocontrol method of region voltage for load-center substation and system - Google Patents

The idle autocontrol method of region voltage for load-center substation and system Download PDF

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Publication number
CN106208088A
CN106208088A CN201610589465.4A CN201610589465A CN106208088A CN 106208088 A CN106208088 A CN 106208088A CN 201610589465 A CN201610589465 A CN 201610589465A CN 106208088 A CN106208088 A CN 106208088A
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China
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voltage
idle
transformer station
svg
perception
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CN106208088B (en
Inventor
陆佳政
朱思国
李波
刘文华
韩英铎
谭艳军
黄清军
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—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
    • 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
    • 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]
    • 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)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention discloses a kind of idle autocontrol method of the region voltage for load-center substation and system, method step includes: provide transient voltage to support by regulation SVG；Detect this transformer station, adjacent substations voltage the most defective, if the voltage of this transformer station is defective, by capacitive reactive power or the idle voltage adjusting this transformer station of perception of regulation SVG, if the voltage of adjacent substations is defective, using the voltage of adjacent substations as controlling target, estimate the voltage of adjacent substations, the capacitive reactive power of regulation SVG or the idle voltage adjusting adjacent substations of perception, otherwise regulate capacitive reactive power or the idle idle level adjusting circuit of perception of SVG；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 requirement of load-center substation, meets multiple control target call, gives full play to SCG advantage, improves utilization rate of equipment and installations.

Description

The idle autocontrol method of region voltage for load-center substation and system
Technical field
The present invention relates to voltage and reactive power control technology, be specifically related to a kind of region electricity for load-center substation Pressing idle autocontrol method and system, voltage based on dynamic reactive compensation device and adjacent substations estimates feasible region electricity Press idle automatically controlling.
Background technology
The voltage power-less of power system adjusts the Voltage Stability Level to electrical network and reduction network loss has large effect.At present Voltage power-less is mainly adjusted by two ways, and one is that AVC system is adjusted on province tune/ground, to the whole network or the voltage power-less of local It is optimized calculating and controls；Two is the VQC system in station, and the reactive apparatus of our station is carried out switching, to meet higher level's scheduling Requirement.
Load-center substation is the pivot point of power system, summarizes multiple power supply and interconnection, accepted backbone and under Level electrical network, not only carries the requirement of voltage power-less regulation, and it is idle to support adjacent power transformation to need to regulate our station if desired The voltage stood, needs release rapidly maximum idle to support voltage when system voltage temporarily falls；When station is built with can be continuous During dynamic passive compensation equipment (hereinafter referred to as SVG, the Static Var Generator) quickly regulated, need to want according to control Ask and it is reasonably utilized.Require more owing to controlling target and control, in AVC system or station are adjusted in current province tune/ground Combine the more difficult satisfied regulation and control requirement of VQC system certainly.
Summary of the invention
The technical problem to be solved in the present invention: for the problems referred to above of prior art, it is provided that a kind of to the SVG in transformer station Automatically control, it is achieved the regulation of this transformer substation voltage, the voltage of adjacent substations estimate regulation, circuit Reactive-power control and transient state Voltage support, to meet the voltage power-less regulation requirement of load-center substation, it is possible to meet 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 above-mentioned technical problem, the technical solution used in the present invention is:
A kind of idle autocontrol method of the region voltage for load-center substation, step includes:
1) transient voltage is provided to support by regulation SVG；
2) voltage detecting this transformer station is the most defective, if the voltage of this transformer station is defective, then with this transformer station Voltage as control target, and by regulation SVG capacitive reactive power or perception the idle voltage adjusting this transformer station, redirect Perform step 2)；Otherwise, then execution step 3 is redirected)；
3) voltage of detection adjacent substations is the most defective, if the voltage of adjacent substations is defective, then with adjacent The voltage of transformer station, as controlling target, estimates the voltage of adjacent substations, the capacitive reactive power of regulation SVG or perception is idle adjusts The voltage of whole adjacent substations, redirects execution step 2)；Otherwise, idle as controlling target using circuit, redirect execution step 4)；
4) regulate capacitive reactive power or the idle idle level adjusting circuit of perception of SVG, redirect execution step 2).
Preferably, described step 2) in adjust this transformer station voltage specifically refer to: by the voltage effective value of this transformer station U0Regulation upper limit U with the voltage of this transformer station setHWith regulation lower limit ULCompare, if voltage effective value U0It is more than Regulation upper limit UH, then control SVG and increase the idle output of perception of designated magnitude, if voltage effective value U0Less than regulation upper limit UL, Then control SVG and increase the capacitive reactive power output of designated magnitude.
Preferably, described step 3) in estimate adjacent substations voltage calculating function expression such as formula (1) shown in；
U x = ( U 0 + P R + Q X U 0 ) 2 + ( P X - Q R U 0 ) 2 - - - ( 1 )
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 Impedance on interconnection between adjacent transformer station, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this change Meritorious on interconnection between power station and adjacent substations, Q is idle on interconnection between this transformer station and adjacent substations, Meritorious P with flow into this transformer station for just, to flow out this transformer station be negative, idle Q with the perception that flows into this transformer station for just, leave The perception of transformer station is negative.
Preferably, described step 3) in adjust adjacent substations voltage specifically refer to: by pre-for the voltage of adjacent substations Valuation UxRegulation upper limit U with the voltage of this transformer station setHWith regulation lower limit ULCompare, if voltage discreet value Ux More than regulation upper limit UH, then control SVG and increase the idle output of perception of designated magnitude, if voltage discreet value UxLess than in regulation Limit UL, then control SVG and increase the capacitive reactive power output of designated magnitude.
Preferably, described step 4) in adjust circuit idle level specifically refer to: by the idle horizontal Q of circuitSWith set The idle upper limit of permission that fixed circuit is idle is QHWith idle lower limit QLCompare, if the idle horizontal Q of circuitSMore than nothing The merit upper limit is QH, then control SVG and increase the capacitive reactive power output of designated magnitude, if the idle horizontal Q of circuitSUnder idle Limit QL, then control SVG and increase the idle output of perception of designated magnitude.
Preferably, described step 1) detailed step include:
1.1) two-point method is used to calculate voltage effective value, use mean square root method calculating voltage to have according to three-phase voltage sampled value Valid value, and calculate the root mean square descending slope of voltage；
1.2) judge that the voltage effective value that two-point method calculates is less than the voltage transient lower limit U setLL, use mean square root method meter The voltage effective value calculated is less than the voltage transient lower limit U setLL, the root mean square descending slope of voltage less than set three bars of thresholding The establishment situation of each condition in part, if having any two to set up in aforementioned three conditions, then judges the system electricity of this transformer station Pressure there occurs to be fallen, and controls the direct amount of exports of SVG and determines capacitive reactive power；
1.3) judge that the voltage effective value that two-point method calculates is higher than voltage transient upper limit U setHH, use mean square root method meter The voltage effective value calculated is higher than voltage transient upper limit U setHH, the root mean square descending slope of voltage higher than set three bars of thresholding The establishment situation of each condition in part, if having any two to set up in aforementioned three conditions, then judges the system electricity of this transformer station Pressure there occurs out-of-limit, and it is idle that control SVG directly exports specified perception.
The present invention also provides for a kind of region voltage reactive automatic control system for load-center substation, including:
Transient voltage support unit, for providing transient voltage to support by regulation SVG；
Our station adjustment unit, the voltage detecting this transformer station is the most defective, if the voltage of this transformer station is defective, then Using the voltage of this transformer station as controlling target, and by the capacitive reactive power of regulation SVG or perception is idle adjusts this transformer station Voltage, redirect execution our station adjustment unit；Otherwise, then execution neighboring station adjustment unit is redirected；
Neighboring station adjustment unit, the most defective for detecting the voltage of adjacent substations, if the voltage of adjacent substations Defective, then using the voltage of adjacent substations as controlling target, estimate the voltage of adjacent substations, the capacitive of regulation SVG without Merit or the idle voltage adjusting adjacent substations of perception, redirect execution our station adjustment unit；Otherwise, idle as control using circuit Target processed, redirects execution line adjustment unit.
Preferably, the voltage that described our station adjustment unit adjusts this transformer station specifically refers to: had by the voltage of this transformer station Valid value U0Regulation upper limit U with the voltage of this transformer station setHWith regulation lower limit ULCompare, if voltage effective value U0 More than regulation upper limit UH, then control SVG and increase the idle output of perception of designated magnitude, if voltage effective value U0Less than in regulation Limit UL, then control SVG and increase the capacitive reactive power output of designated magnitude.
Preferably, described neighboring station adjustment unit estimates calculating function expression such as formula (1) institute of voltage of adjacent substations Show；
U x = ( U 0 + P R + Q X U 0 ) 2 + ( P X - Q R U 0 ) 2 - - - ( 1 )
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 Impedance on interconnection between adjacent transformer station, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this change Meritorious on interconnection between power station and adjacent substations, Q is idle on interconnection between this transformer station and adjacent substations, Meritorious P with flow into this transformer station for just, to flow out this transformer station be negative, idle Q with the perception that flows into this transformer station for just, leave The perception of transformer station is negative.
Preferably, the voltage of described neighboring station adjustment unit adjustment adjacent substations specifically refers to: by the electricity of adjacent substations Pressure discreet value UxRegulation upper limit U with the voltage of this transformer station setHWith regulation lower limit ULCompare, if voltage is estimated Value UxMore than regulation upper limit UH, then control SVG and increase the idle output of perception of designated magnitude, if voltage discreet value UxLess than adjusting Joint upper limit UL, then control SVG and increase the capacitive reactive power output of designated magnitude.
Preferably, the idle level of described line adjustment unit adjustment circuit specifically refers to: by the idle horizontal Q of circuitS The idle upper limit of permission idle with the circuit set is as QHWith idle lower limit QLCompare, if the idle horizontal Q of circuitSGreatly It is Q in the idle upper limitH, then control SVG and increase the capacitive reactive power output of designated magnitude, if the idle horizontal Q of circuitSLess than nothing Merit lower limit QL, then control SVG and increase the idle output of perception of designated magnitude.
Preferably, described transient voltage support unit includes:
Calculation of characteristic parameters module, for using two-point method to calculate voltage effective value, employing according to three-phase voltage sampled value Mean square root method calculates voltage effective value, and calculates the root mean square descending slope of voltage；
Fall judge module, for judging that the voltage effective value that two-point method calculates is less than the voltage transient lower limit U setLL、 Use the voltage effective value that mean square root method calculates less than the voltage transient lower limit U setLL, the root mean square descending slope of voltage is less than Set the establishment situation of each condition in three conditions of thresholding, if aforementioned three conditions have any two to set up, then judge this The system voltage of transformer station there occurs and falls, and controls the direct amount of exports of SVG and determines capacitive reactive power；
Out-of-limit judging module, for judging that the voltage effective value that two-point method calculates is higher than voltage transient upper limit U setHH、 Use the voltage effective value that mean square root method calculates higher than voltage transient upper limit U setHH, the root mean square descending slope of voltage is higher than Set the establishment situation of each condition in three conditions of thresholding, if aforementioned three conditions have any two to set up, then judge this The system voltage of transformer station there occurs out-of-limit, and it is idle that control SVG directly exports specified perception.
The present invention idle autocontrol method of region voltage for load-center substation has an advantage that
1, the present invention passes through step 1)～3) according to priority realizing multiple control target, control hierarchy is clear, can meet The regulation and control requirement of our station voltage power-less, it is also possible to neighboring station voltage is supported；
2, present invention achieves voltage power-less homeostatic control and the combination of transient state control, farthest improve voltage steady Qualitative.
3, the present invention is when realizing multiple control target, be adjusted with step-type control mode, it is to avoid repeatedly adjust Joint vibration.
4, the present invention passes through multicriterion comprehensive descision voltage transient, improves stablizing of judgement while quickly judging Property；
The present invention region voltage reactive automatic control system for load-center substation is that the present invention is for load-center substation The completely corresponding system of the idle autocontrol method of region voltage, the most also there is the present invention for load-center substation The aforementioned advantages of region voltage is idle autocontrol method, therefore do not repeat them here.
Accompanying drawing explanation
Fig. 1 is the SVG main electrical scheme schematic diagram of application embodiment of the present invention method.
Fig. 2 is the basic procedure schematic diagram of embodiment of the present invention method.
Fig. 3 is the voltage power-less thresholding schematic diagram in the embodiment of the present invention.
Detailed description of the invention
Hereafter by as a example by the SVG main electrical scheme shown in Fig. 1, idle certainly to the present invention region voltage for load-center substation Flowing control method is described in further detail.
As in figure 2 it is shown, the present embodiment includes for the step of the idle autocontrol method of region voltage of load-center substation:
1) transient voltage is provided to support by regulation SVG；
2) voltage detecting this transformer station is the most defective, if the voltage of this transformer station is defective, then with this transformer station Voltage as control target, and by regulation SVG capacitive reactive power or perception the idle voltage adjusting this transformer station, redirect Perform step 2)；Otherwise, then execution step 3 is redirected)；
3) voltage of detection adjacent substations is the most defective, if the voltage of adjacent substations is defective, then with adjacent The voltage of transformer station, as controlling target, estimates the voltage of adjacent substations, the capacitive reactive power of regulation SVG or perception is idle adjusts The voltage of whole adjacent substations, redirects execution step 2)；Otherwise, idle as controlling target using circuit, redirect execution step 4)；
4) regulate capacitive reactive power or the idle idle level adjusting circuit of perception of SVG, 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 U0Regulation upper limit U with the voltage of this transformer station setHWith regulation lower limit ULCompare, if voltage effective value U0It is more than Regulation upper limit UH, then control SVG and increase the idle output of perception of designated magnitude, if voltage effective value U0Less than regulation upper limit UL, Then control SVG and increase the capacitive reactive power output of designated magnitude.See described above to understand, work as U0>UHTime, SVG increases certain amplitude The idle output of perception, i.e. Q'SVGx=QSVG+ Δ Q, works as U0<ULTime, SVG increases the capacitive reactive power output of certain amplitude, i.e. Q'SVGx=QSVG-Δ Q, wherein, QSVGIt is the idle output of SVG last time, Q'SVGxBeing the idle reference of this secondary control SVG, Δ Q is Idle increment, the percentage ratio of desirable SVG rated capacity, if perception is just, capacitive is negative.Regulating time interval and idle increment width Degree can 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 capacity.
In the present embodiment, described step 3) in estimate calculating function expression such as formula (1) institute of voltage of adjacent substations Show；
U x = ( U 0 + P R + Q X U 0 ) 2 + ( P X - Q R U 0 ) 2 - - - ( 1 )
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 Impedance on interconnection between adjacent transformer station, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this change Meritorious on interconnection between power station and adjacent substations, Q is idle on interconnection between this transformer station and adjacent substations, Meritorious P with flow into this transformer station for just, to flow out this transformer station be negative, idle Q with the perception that flows into this transformer station for just, leave 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 combining from backstage, passes through Communications is to SVG controller.Multiple neighboring station voltages can carry out estimating and reactive requirement analysis simultaneously.
In the present embodiment, step 3) in adjust the voltage of adjacent substations and specifically refer to: by pre-for the voltage of adjacent substations Valuation UxRegulation upper limit U with the voltage of this transformer station setHWith regulation lower limit ULCompare, if voltage discreet value Ux More than regulation upper limit UH, then control SVG and increase the idle output of perception of designated magnitude, if voltage discreet value UxLess than in regulation Limit UL, then control SVG and increase the capacitive reactive power output of designated magnitude.I.e. work as Ux>UHTime, the perception that SVG increases certain amplitude is idle Output, i.e. Q'SVGx=QSVG+ΔQ；Work as Ux<ULTime, SVG increases the capacitive reactive power output of certain amplitude, i.e. Q'SVGx=QSVG-Δ Q, wherein, QSVGIt is the idle output of SVG last time, Q'SVGxBeing the idle reference of this secondary control SVG, Δ Q is idle increment, desirable The percentage ratio of SVG rated capacity, if perception is just, capacitive is negative.Regulating time interval and idle incremental amplitude can set, this enforcement In example, regulating time interval is set to 2 cycles, and idle incremental amplitude is set to the 5% of SVG rated capacity.
In the present embodiment, step 4) in adjust the idle level of circuit and specifically refer to: by the idle horizontal Q of circuitSWith set The idle upper limit of permission that fixed circuit is idle is QHWith idle lower limit QLCompare, if the idle horizontal Q of circuitSMore than nothing The merit upper limit is QH, then control SVG and increase the capacitive reactive power output of designated magnitude, if the idle horizontal Q of circuitSUnder idle Limit QL, then control SVG and increase the idle output of perception of designated magnitude.I.e. work as QS>QHTime, SVG increases the capacitive reactive power of certain amplitude Output, i.e. Q'SVGx=QSVG-ΔQ；Work as QS<QLTime, SVG increases the idle output of perception of certain amplitude, i.e. Q'SVGx=QSVG+Δ Q, wherein, QSVGIt is the idle output of SVG last time, Q'SVGxBeing the idle reference of this secondary control SVG, Δ Q is idle increment, desirable The percentage ratio of SVG rated capacity, if perception is just, capacitive is negative.Regulating time interval and idle incremental amplitude can set, this enforcement Example regulating time interval is set to 2 seconds, and idle incremental amplitude is set to the 10% of SVG rated capacity.
In the present embodiment, step 1) detailed step include:
1.1) two-point method is used to calculate voltage effective value, use mean square root method calculating voltage to have according to three-phase voltage sampled value Valid value, and calculate the root mean square descending slope of voltage；
1.2) judge that the voltage effective value that two-point method calculates is less than the voltage transient lower limit U setLL, use mean square root method meter The voltage effective value calculated is less than the voltage transient lower limit U setLL, the root mean square descending slope of voltage less than set three bars of thresholding The establishment situation of each condition in part, if having any two to set up in aforementioned three conditions, then judges the system electricity of this transformer station Pressure there occurs to be fallen, and controls the direct amount of exports of SVG and determines capacitive reactive power；
1.3) judge that the voltage effective value that two-point method calculates is higher than voltage transient upper limit U setHH, use mean square root method meter The voltage effective value calculated is higher than voltage transient upper limit U setHH, the root mean square descending slope of voltage higher than set three bars of thresholding The establishment situation of each condition in part, if having any two to set up in aforementioned three conditions, then judges the system electricity of this transformer station Pressure there occurs out-of-limit, and it is idle that control SVG directly exports specified perception.
Above-mentioned 1.1)～1.3) regulation SVG provide transient voltage support the most preferentially perform, it is possible to the fastest Speed supports voltage stabilization.In the present embodiment, set regulation upper limit U of the voltage of this transformer stationHThan voltage transient upper limit UHHIt is little, Set the regulation lower limit U of the voltage of this transformer stationLThan voltage transient lower limit ULLGreatly, the idle upper limit of its permission idle with circuit is QHWith idle lower limit QLRelation respectively the most as shown in Figure 3.
In sum, the present embodiment according to priority realizes multiple control target, preferentially controls when this transformer substation voltage is defective Our station voltage processed, with the neighboring station voltage estimated based on Line Flow and impedance for controlling target when our station voltage is qualified, our station and When neighboring station voltage is the most qualified idle for controlling target with circuit, the transient voltage of this transformer station controls to have precedence over any of the above described mesh Mark, and by increasing the capacitive reactive power of SVG or reducing perceptual idle to improve voltage, the perception by increase SVG is idle or fall Low capacitive reactive power is to reduce voltage；Multicriterion is used quickly to judge to fall to improve the response speed that transient voltage supports, this Embodiment clear layer, can meet our station voltage and idle regulation and control requirement, it is also possible to be supported neighboring station voltage, and Take into account voltage power-less homeostatic control and transient state has controlled, it is achieved that dynamic passive compensation equipment SVG has made full use of.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement 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 are also Should be regarded as protection scope of the present invention.

Claims (10)

1. the idle autocontrol method of region voltage for load-center substation, it is characterised in that step includes:
1) transient voltage is provided to support by regulation SVG；
2) voltage detecting this transformer station is the most defective, if the voltage of this transformer station is defective, then with the electricity of this transformer station Pressure is as controlling target, and by regulating capacitive reactive power or the idle voltage adjusting this transformer station of perception of SVG, redirects execution Step 2)；Otherwise, then execution step 3 is redirected)；
3) voltage of detection adjacent substations is the most defective, if the voltage of adjacent substations is defective, then with adjacent power transformation The voltage stood, as controlling target, estimates the voltage of adjacent substations, the capacitive reactive power of regulation SVG or perception is idle adjusts phase The voltage of adjacent transformer station, redirects execution step 2)；Otherwise, idle as controlling target using circuit, redirect execution step 4)；
4) regulate capacitive reactive power or the idle idle level adjusting circuit of perception of SVG, redirect execution step 2).
The idle autocontrol method of region voltage for load-center substation the most according to claim 1, it is characterised in that Described step 2) in adjust this transformer station voltage specifically refer to: by the voltage effective value U of this transformer station0With this power transformation set Regulation upper limit U of the voltage stoodHWith regulation lower limit ULCompare, if voltage effective value U0More than regulation upper limit UH, then control SVG increases the idle output of perception of designated magnitude, if voltage effective value U0Less than regulation upper limit UL, then control SVG and increase appointment The capacitive reactive power output of amplitude.
The idle autocontrol method of region voltage for load-center substation the most according to claim 1, it is characterised in that Described step 3) in estimate adjacent substations voltage calculating function expression such as formula (1) shown in；
U x = ( U 0 + P R + Q X U 0 ) 2 + ( P X - Q R U 0 ) 2 - - - ( 1 )
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 Impedance on interconnection between power station, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this transformer station And meritorious on interconnection between adjacent substations, Q is idle on interconnection between this transformer station and adjacent substations, meritorious P with flow into this transformer station for just, to flow out this transformer station be negative, idle Q with the perception that flows into this transformer station for just, leave this power transformation The perception stood is negative.
The idle autocontrol method of region voltage for load-center substation the most according to claim 1, it is characterised in that Described step 3) in adjust adjacent substations voltage specifically refer to: by the voltage discreet value U of adjacent substationsxWith the basis set Regulation upper limit U of the voltage of transformer stationHWith regulation lower limit ULCompare, if voltage discreet value UxMore than regulation upper limit UH, then Control SVG and increase the idle output of perception of designated magnitude, if voltage discreet value UxLess than regulation upper limit UL, then controlling SVG increases The capacitive reactive power output of designated magnitude.
The idle autocontrol method of region voltage for load-center substation the most according to claim 1, it is characterised in that Described step 4) in adjust circuit idle level specifically refer to: by the idle horizontal Q of circuitSWith the idle permission of circuit set The idle upper limit be QHWith idle lower limit QLCompare, if the idle horizontal Q of circuitSIt is Q more than the idle upper limitH, then control SVG increases the capacitive reactive power output of designated magnitude, if the idle horizontal Q of circuitSLess than idle lower limit QL, then controlling SVG increases The idle output of perception of designated magnitude.
6. according to the idle side of automatically controlling of the region voltage for load-center substation described in any one in Claims 1 to 5 Method, it is characterised in that described step 1) detailed step include:
1.1) two-point method is used to calculate voltage effective value, use mean square root method calculating voltage effective according to three-phase voltage sampled value Value, and calculate the root mean square descending slope of voltage；
1.2) judge that the voltage effective value that two-point method calculates is less than the voltage transient lower limit U setLL, use mean square root method calculate Voltage effective value is less than the voltage transient lower limit U setLL, the root mean square descending slope of voltage is less than setting in three conditions of thresholding The establishment situation of each condition, if having any two to set up in aforementioned three conditions, then judges that the system voltage of this transformer station is sent out Give birth to and fallen, controlled the direct amount of exports of SVG and determine capacitive reactive power；
1.3) judge that the voltage effective value that two-point method calculates is higher than voltage transient upper limit U setHH, use mean square root method calculate Voltage effective value is higher than voltage transient upper limit U setHH, the root mean square descending slope of voltage is higher than setting in three conditions of thresholding The establishment situation of each condition, if having any two to set up in aforementioned three conditions, then judges that the system voltage of this transformer station is sent out Having given birth to out-of-limit, it is idle that control SVG directly exports specified perception.
7. the region voltage reactive automatic control system for load-center substation, it is characterised in that including:
Transient voltage support unit, for providing transient voltage to support by regulation SVG；
Our station adjustment unit, the voltage detecting this transformer station is the most defective, if the voltage of this transformer station is defective, then with this The voltage of transformer station as control target, and by regulation SVG capacitive reactive power or perception the idle electricity adjusting this transformer station Pressure, redirects execution our station adjustment unit；Otherwise, then execution neighboring station adjustment unit is redirected；
Neighboring station adjustment unit, the most defective, if the voltage of adjacent substations does not conforms to for detecting the voltage of adjacent substations Lattice, then using the voltage of adjacent substations as controlling target, estimate the voltage of adjacent substations, the capacitive reactive power of regulation SVG or The idle voltage adjusting adjacent substations of perception, redirects execution our station adjustment unit；Otherwise, idle as controlling mesh using circuit Mark, redirects execution line adjustment unit；
Line adjustment unit, for regulating capacitive reactive power or the idle idle level adjusting circuit of perception of SVG.
Region voltage reactive automatic control system for load-center substation the most according to claim 7, it is characterised in that The voltage that described our station adjustment unit adjusts this transformer station specifically refers to: by the voltage effective value U of this transformer station0With the basis set Regulation upper limit U of the voltage of transformer stationHWith regulation lower limit ULCompare, if voltage effective value U0More than regulation upper limit UH, then Control SVG and increase the idle output of perception of designated magnitude, if voltage effective value U0Less than regulation upper limit UL, then controlling SVG increases The capacitive reactive power output of designated magnitude.
Region voltage reactive automatic control system for load-center substation the most according to claim 7, it is characterised in that Described neighboring station adjustment unit is estimated shown in the calculating function expression such as formula (1) of the voltage of adjacent substations；
U x = ( U 0 + P R + Q X U 0 ) 2 + ( P X - Q R U 0 ) 2 - - - ( 1 )
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 Impedance on interconnection between power station, X is the impedance between adjacent substations and this transformer station on interconnection, and P is this transformer station And meritorious on interconnection between adjacent substations, Q is idle on interconnection between this transformer station and adjacent substations, meritorious P with flow into this transformer station for just, to flow out this transformer station be negative, idle Q with the perception that flows into this transformer station for just, leave this power transformation The perception stood is negative.
Region voltage reactive automatic control system for load-center substation the most according to claim 7, its feature exists In, described transient voltage support unit includes:
Calculation of characteristic parameters module, for according to three-phase voltage sampled value use two-point method calculate voltage effective value, use mean square Root method calculates voltage effective value, and calculates the root mean square descending slope of voltage；
Fall judge module, for judging that the voltage effective value that two-point method calculates is less than the voltage transient lower limit U setLL, use The voltage effective value that mean square root method calculates is less than the voltage transient lower limit U setLL, the root mean square descending slope of voltage less than set The establishment situation of each condition in three conditions of thresholding, if having any two to set up in aforementioned three conditions, then judges this power transformation The system voltage stood there occurs and falls, and controls the direct amount of exports of SVG and determines capacitive reactive power；
Out-of-limit judging module, for judging that the voltage effective value that two-point method calculates is higher than voltage transient upper limit U setHH, use The voltage effective value that mean square root method calculates is higher than voltage transient upper limit U setHH, the root mean square descending slope of voltage higher than set The establishment situation of each condition in three conditions of thresholding, if having any two to set up in aforementioned three conditions, then judges this power transformation The system voltage stood there occurs out-of-limit, and it is idle that control SVG directly exports specified perception.
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CN103928984A (en) * 2014-03-31 2014-07-16 国家电网公司 Automatic voltage control device and control method for distributed photovoltaic power station
CN104917188A (en) * 2015-05-26 2015-09-16 华南理工大学 Grouping-coordination-based reactive power control method of 220-kV transformer stations
CN105406482A (en) * 2015-12-07 2016-03-16 广东电网有限责任公司汕头供电局 Voltage reactive control method and voltage reactive control system based on reactive compensation device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140148966A1 (en) * 2012-11-29 2014-05-29 Magdy Salama Decentralized Volt/VAR Control for Advanced Distribution Automation Systems
CN103928984A (en) * 2014-03-31 2014-07-16 国家电网公司 Automatic voltage control device and control method for distributed photovoltaic power station
CN104917188A (en) * 2015-05-26 2015-09-16 华南理工大学 Grouping-coordination-based reactive power control method of 220-kV transformer stations
CN105406482A (en) * 2015-12-07 2016-03-16 广东电网有限责任公司汕头供电局 Voltage reactive control method and voltage reactive control system based on reactive compensation device

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