CN102904287B - Coordination control method for flexible alternate current transmission system (FACTS) devices of new energy delivery system - Google Patents
Coordination control method for flexible alternate current transmission system (FACTS) devices of new energy delivery system Download PDFInfo
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- CN102904287B CN102904287B CN201210369375.6A CN201210369375A CN102904287B CN 102904287 B CN102904287 B CN 102904287B CN 201210369375 A CN201210369375 A CN 201210369375A CN 102904287 B CN102904287 B CN 102904287B
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a coordination control method for flexible alternate current transmission system (FACTS) devices of a new energy delivery system. The method includes inner layer control, outer layer control and outermost layer control, priority level of the outermost layer control is higher than that of the outer layer control, and priority level of the outer layer control is higher than that of the inner layer control. The inner layer control can guarantee that voltage of a transformer substation can be accurately controlled in a certain value or a certain range, and when the system is in large disturbance, the outer layer control and the outermost layer control can provide urgent reactive power support, so that the voltage of the transformer substation can rapidly recover to an allowed range. The method has the advantages that three layers of voltage control are combined so that motions of a plurality of FACTS devices can be coordinated and controlled in a centralized, high accuracy and high efficiency mode, and the engineering adaptability is high.
Description
Technical field
The invention belongs to technical field of power systems, be specifically related to a kind of FACTS equipment coordination control method of new forms of energy delivery system.
Background technology
Along with Xinjiang and northwest Major Networks second channel build up, first passage-second channel-extra large western passage total length will be formed close to 750 kilovolts of dual-ring networks of 3000 kilometers.On this passage, string has Jiuquan, ten million multikilowatt large-scale wind electricity base, two, Hami and Hai Xi photovoltaic base.The new energy development in these areas presents on a large scale, high concentrated, remote feature, and development rapidly.Along with the extensive feed-in of new forms of energy, wind power on a large scale, the fluctuation of frequent cause Xinjiang and northwest to network two passages on trend fluctuate frequently, reactive power/voltage control difficulty.Adopt conventional low-pressure reactive compensation equipment cannot meet the requirement of frequent switching, need to adopt dynamic passive compensation equipment.According to planning demonstration, Xinjiang and northwest second channel of networking is planned and is installed the novel FACTS device of many covers capacity.Wherein, husky state ~ fish blocks two loop line roads and configures 4 groups of circuit stagewise controlled reactors altogether, every pool-size 390Mvar, fixed capacity 39Mvar, variable capacity 351Mvar, and three grades adjustable, single capacity 117Mvar; Husky transformer tertiary winding side, station, state configuration Static Var Compensator SVC(360Mvar capacitive, 360Mvar perception); The controlled high resistance of fish card station bus bar configuration 330Mvar magnetic valve type bus, fixed capacity is 16.5Mvar, continuously adjustabe.
At present, 750kV controlled reactor and the SVC independently domestic existing research of control strategy, but the coordination control strategy between many FACTS equipment still belongs to blank at home.China's station, 750kV Dunhuang controlled high resistance demonstration project is the controlled high resistance engineering that world head cover 750kV wind-powered electricity generation concentrates transmitting system to apply, and this project successfully put into operation on January 5th, 2012.For Dunhuang 750kV controlled reactor, China's DianKeYuan system propose based on reactive requirement increment and bus boundary voltage controlled reactor inside and outside double-deck control strategy, in control strategy reality, application is good, for suppressing busbar voltage fluctuation, reduce circuit reactive loss, in transient process, realize busbar voltage dynamic support, reduce the action frequency of low-voltage reactive compensator capable in station and alleviate stand in operating pressure effect obvious.Static Var Compensator SVC, as reactive power compensation, the effective means suppressing voltage fluctuation, has been widely used in middle high-pressure electrical network and supergrid at present, and has have accumulated operating experience for many years.SVC be mainly used in after a failure in transient process for electrical network provides urgent reactive power compensation to support to strengthen line voltage with the security and stability improving electrical network, normality provides continuous print reactive power to regulate with the fluctuation suppressing voltage in running simultaneously.SVC generally adopts the control strategy based on voltage, is regulated by continuous print, can maintain SVC place busbar voltage constant.
Xinjiang and northwest Major Networks second channel are installed the controlled high resistance of 5 cover 750kV, 1 altogether and are overlapped 66kV SVC, are in the world first at 750kV transmission system pooled applications novel high-capacity FACTS equipment.Realize the coordination optimization control between controlled high resistance group, the coordination optimization between controlled high resistance and SVC controls, the two passage transmission system reactive voltage frequent fluctuation caused because new forms of energy fluctuate for effective suppression are very crucial.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of FACTS equipment coordination control method of new forms of energy delivery system, be divided into internal layer to control, skin controls and outermost layer controls, wherein, outermost layer controls priority and controls higher than skin, and the outer priority that controls controls higher than internal layer.Internal layer controls to ensure that transformer substation voltage can accurately control within the scope of certain value or certain, and outer control and outermost layer control to provide urgent reactive power support when large disturbances appears in system, ensures that transformer substation voltage can return to rapidly in allowed band.The method that three layers of voltage control combines can high accuracy, concentrate the multiple FACTS device action of cooperation control efficiently, engineering adaptability is very strong.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of FACTS equipment coordination control method of new forms of energy delivery system, described method comprises internal layer control, outer control and outermost layer and controls; Described internal layer controls transformer substation voltage accurately to control in voltage-target or voltage control band; When large disturbances appears in new forms of energy delivery system, outer control and outermost layer control to provide urgent reactive power support, and transformer substation voltage is returned to rapidly in allowed band.
Described new forms of energy delivery system is Xinjiang and northwest Major Networks second channel, and wind-powered electricity generation and solar energy are sent outside by passage of networking, and described networking passage installs FACTS equipment; Wherein, become tertiary winding side installing 66kV Static Var Compensator the husky state station owner that networking passage is along the line, at fish card power switch station, bus bar side installs the controlled high resistance of magnet controlled bus, in Sha Zhou ~ controlled high resistance of fish card circuit double-circuit line both sides installing stagewise.
During described internal layer controls, internal layer voltage control was every 1 minute circulation primary; Sha Zhouzhan and fish card station internal layer control to arrange time delay 30s, to avoid Sha Zhouzhan and the action simultaneously of the controlled high resistance of fish card station track road stagewise.
Described internal layer voltage control for input variable, inputs station, husky state control voltage desired value V with substation bus bar voltage
1, fish card station control voltage desired value V
2, husky state busbar voltage control cincture [V
1-Δ V
1, V
1+ Δ V
1] and fish card busbar voltage control cincture [V
2-Δ V
2, V
2+ Δ V
2], Δ V
1with Δ V
2be respectively the busbar voltage deviation of Sha Zhouzhan and the station permission of fish card, V
1, V
2, Δ V
1with Δ V
2numerical value determined by user.
During internal layer voltage control, the preferential trailing type regulating action playing husky state Static Var Compensator, the magnet controlled controlled high resistance of fish card, controls at V respectively by husky state station voltage and fish card station voltage
1and V
2; When Static Var Compensator, magnet controlled controlled high resistance have reached maximum/minimum capacity, husky state/fish card busbar voltage still not in voltage control band, now station in the controlled high resistance trigger action of circuit; For reducing equipment loss, when controlled high resistance controls to trigger, the husky state controlled high resistance I in station track road and II alternating movement, the controlled high resistance I in fish card station track road and II alternating movement, each action one-level;
When after one group of circuit controlled high resistance I action one-level in station, if monitoring busbar voltage is not still when allowing in voltage control band, then send out triggering command to the controlled high resistance II of another group circuit of our station, controlled high resistance II action one-level, if now controlled high resistance II fault or reached maximum/minimum capacity, then send out triggering command to controlled high resistance I, controlled high resistance I action one-level again;
When in station, one group of controlled high resistance I of circuit needs action, but due to controlled high resistance I faults itself or reached maximum/minimum capacity, then send out triggering command to the controlled high resistance II of another group circuit of our station, controlled high resistance II action one-level, after controlled high resistance II action one-level, if monitoring busbar voltage is not still when allowing in voltage control band, then controlled high resistance II needs action one-level again.
Described skin control for input variable, inputs outer voltage coboundary U with substation bus bar voltage
1with outer voltage lower boundary U
2, outer voltage coboundary U
1with outer voltage lower boundary U
2determined by user; Outer control Real-Time Monitoring voltage, when there is large disturbance in new forms of energy delivery system, continuous 5s monitors busbar voltage at [U
2, U
1] outside, in standing, two groups of controlled high resistance I of circuit and controlled high resistance II are excised simultaneously or drop into a level capacity, now dynamic adjustments is complete within the monitoring time of 5s for Static Var Compensator and magnet controlled controlled high resistance, reach its maximum/minimum capacity, after the controlled high resistance action of circuit, then start to circulate timing next time;
When generating region internal fault, i.e. husky state ~ fish card line fault, then preferential electro-magnetic transient controls; If within the monitoring time of 5s, in standing, tuning controller and the controlled high resistance of circuit receive husky state ~ fish card circuit relay and protect outlet signal or circuit breaker position contact point signal, then locking skin controls, start electro-magnetic transient control strategy, controlled for both sides circuit high resistance is thrown to heap(ed) capacity, after electro-magnetic transient control terminates, go back to outer control.
Described outermost layer voltage control is with substation bus bar voltage for input variable, and input outermost layer voltage control upper limit U', the numerical value of U' is determined by user; Outermost layer voltage control real-time monitoring system voltage, once monitor voltage higher than U', in standing, the action immediately of two groups of controlled high resistances of circuit stagewise is to heap(ed) capacity, to suppress system high pressure.
Described outermost layer controls priority and controls higher than skin, and the outer priority that controls controls higher than internal layer.
Compared with prior art, beneficial effect of the present invention is:
1. method of the present invention is directly control objectives with voltage, explicit physical meaning, simple, intuitive.
2. the FACTS equipment (comprise Static Var Compensator and magnet controlled bus controlled high resistance) of the present invention by continuous voltage regulating and the controlled high resistance effective coordination of circuit of classification action.When wind power fluctuation causes system voltage to change, the preferential action of continuous voltage regulating equipment, plays it and follows voltage regulation function, accurately controls voltage in desired value.When continuous voltage regulating equipment has been adjusted to maximum/minimum capacity, when transformer substation voltage still runaways, the now controlled high resistance of stagewise circuit action again, by voltage control in the reasonable scope.Control method give full play to SVC, the controlled high resistance of magnet controlled bus follow voltage regulation function continuously, avoid the frequent movement of the controlled high resistance of stagewise, significantly improve operation precision and the utilization ratio of each FACTS equipment.
3. the present invention adopts three layers of voltage control, and outermost layer controls to have precedence over outer control, and outer control has precedence over internal layer and controls, and in different key-courses, the controlled high resistance of stagewise takes different action principles.During internal layer controls, one group of stagewise controlled high resistance action one-level in each permission transformer station; In outer control, the two groups of controlled high resistance of stagewise action simultaneously one-levels in each permission transformer station; During outermost layer controls, in each permission transformer station, the action simultaneously of two groups of controlled high resistances of stagewise is to heap(ed) capacity.Take different stagewises controlled high resistance action principle, both can reduce the action frequency of controlled high resistance and the impact to system when internal layer controls, again can when skin controls and outermost layer controls for system provides urgent reactive power support.The method that three layers of control combines makes controlled high resistance action reasonability significantly improve, and providing guarantee, having broad application prospects for playing a role in the transmission system that controlled high resistance is sent outside at extensive new forms of energy.
Accompanying drawing explanation
Fig. 1 is the FACTS equipment coordination control method schematic diagram of new forms of energy delivery system;
Fig. 2 is the outer control strategy schematic diagram in station, husky state in the embodiment of the present invention;
Fig. 3 is the outer control strategy schematic diagram in fish card station in the embodiment of the present invention;
Fig. 4 is station, husky state outermost layer control strategy schematic diagram in the embodiment of the present invention;
Fig. 5 is fish card station outermost layer control strategy schematic diagram in the embodiment of the present invention;
Fig. 6 is Xinjiang and northwest Major Networks second channel schematic diagram in the embodiment of the present invention;
Fig. 7 is the controlled high resistance action diagram in husky side line road, state when the summer in 2013, large mode leeward electricity evenly fluctuated in the embodiment of the present invention;
Fig. 8 is summer in 2013 the large mode leeward electricity evenly controlled high resistance action diagram in fluctuation macrura reevesii card side line road in the embodiment of the present invention;
Fig. 9 is husky state SVC action diagram when the summer in 2013, large mode leeward electricity evenly fluctuated in the embodiment of the present invention;
Figure 10 is summer in 2013 the large mode leeward electricity evenly controlled high resistance action diagram of fluctuation macrura reevesii card bus in the embodiment of the present invention;
Figure 11 is husky station, state and fish card 750kV side change in voltage figure, station (kV) when the summer in 2013, large mode leeward electricity evenly fluctuated in the embodiment of the present invention;
Figure 12 is husky state station change in voltage figure (kV) after Dunhuang ~ Jiuquan circuit N-2 fault under summer in 2013 large basal profile in the embodiment of the present invention;
Figure 13 be in the embodiment of the present invention under summer in 2013 large basal profile after Dunhuang ~ Jiuquan circuit N-2 fault fish card station change in voltage figure (kV);
Figure 14 is husky state station change in voltage figure (kV) after the wind-powered electricity generation off-grid of Gansu under winter in 2013 large limit mode in the embodiment of the present invention;
Figure 15 be in the embodiment of the present invention under winter in 2013 large limit mode after the wind-powered electricity generation off-grid of Gansu fish card station change in voltage figure (kV).
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1, the invention provides a kind of FACTS equipment coordination control method of new forms of energy delivery system, described method comprises internal layer control, outer control and outermost layer and controls; Described internal layer controls transformer substation voltage accurately to control in voltage-target or voltage control band; When large disturbances appears in new forms of energy delivery system, outer control and outermost layer control to provide urgent reactive power support, and transformer substation voltage is returned to rapidly in allowed band.
During described internal layer controls, internal layer voltage control was every 1 minute circulation primary; Sha Zhouzhan and fish card station internal layer control to arrange time delay 30s, to avoid Sha Zhouzhan and the action simultaneously of the controlled high resistance of fish card station track road stagewise.
Described internal layer voltage control for input variable, inputs station, husky state control voltage desired value V with substation bus bar voltage
1, fish card station control voltage desired value V
2, husky state busbar voltage control cincture [V
1-Δ V
1, V
1+ Δ V
1] and fish card busbar voltage control cincture [V
2-Δ V
2, V
2+ Δ V
2], Δ V
1with Δ V
2be respectively the busbar voltage deviation of Sha Zhouzhan and the station permission of fish card, V
1, V
2, Δ V
1with Δ V
2numerical value determined by user.
During internal layer voltage control, the preferential trailing type regulating action playing husky state Static Var Compensator, the magnet controlled controlled high resistance of fish card, controls at V respectively by husky state station voltage and fish card station voltage
1and V
2; When Static Var Compensator, magnet controlled controlled high resistance have reached maximum/minimum capacity, husky state/fish card busbar voltage still not in voltage control band, now station in the controlled high resistance trigger action of circuit; For reducing equipment loss, when controlled high resistance controls to trigger, the husky state controlled high resistance I in station track road and II alternating movement, the controlled high resistance I in fish card station track road and II alternating movement, each action one-level;
When after one group of circuit controlled high resistance I action one-level in station, if monitoring busbar voltage is not still when allowing in voltage control band, then send out triggering command to the controlled high resistance II of another group circuit of our station, controlled high resistance II action one-level, if now controlled high resistance II fault or reached maximum/minimum capacity, then send out triggering command to controlled high resistance I, controlled high resistance I action one-level again;
When in station, one group of controlled high resistance I of circuit needs action, but due to controlled high resistance I faults itself or reached maximum/minimum capacity, then send out triggering command to the controlled high resistance II of another group circuit of our station, controlled high resistance II action one-level, after controlled high resistance II action one-level, if monitoring busbar voltage is not still when allowing in voltage control band, then controlled high resistance II needs action one-level again.
As Fig. 2 and Fig. 3, described skin control for input variable, inputs outer voltage coboundary U with substation bus bar voltage
1with outer voltage lower boundary U
2, outer voltage coboundary U
1with outer voltage lower boundary U
2determined by user; Outer control Real-Time Monitoring voltage, when there is large disturbance in new forms of energy delivery system, continuous 5s monitors busbar voltage at [U
2, U
1] outside, in standing, two groups of controlled high resistance I of circuit and controlled high resistance II are excised simultaneously or drop into a level capacity, now dynamic adjustments is complete within the monitoring time of 5s for Static Var Compensator and magnet controlled controlled high resistance, reach its maximum/minimum capacity, after the controlled high resistance action of circuit, then start to circulate timing next time;
When generating region internal fault, i.e. husky state ~ fish card line fault, then preferential electro-magnetic transient controls; If within the monitoring time of 5s, in standing, tuning controller and the controlled high resistance of circuit receive husky state ~ fish card circuit relay and protect outlet signal or circuit breaker position contact point signal, then locking skin controls, start electro-magnetic transient control strategy, controlled for both sides circuit high resistance is thrown to heap(ed) capacity, after electro-magnetic transient control terminates, go back to outer control.
As Fig. 4 and Fig. 5, described outermost layer voltage control is with substation bus bar voltage for input variable, and input outermost layer voltage control upper limit U', the numerical value of U' is determined by user; Outermost layer voltage control real-time monitoring system voltage, once monitor voltage higher than U', in standing, the action immediately of two groups of controlled high resistances of circuit stagewise is to heap(ed) capacity, to suppress system high pressure.
As Fig. 6, described new forms of energy delivery system is Xinjiang and northwest Major Networks second channel, and wind-powered electricity generation and solar energy are sent outside by passage of networking, and described networking passage installs FACTS equipment; Wherein, become tertiary winding side installing 66kV Static Var Compensator the husky state station owner that networking passage is along the line, install the controlled high resistance of magnet controlled bus in switchyard fish card bus bar side, in Sha Zhou ~ controlled high resistance of fish card circuit double-circuit line both sides installing stagewise.
Carry out control strategy simulation calculation based on BPA flow calculation program, investigate carry Xinjiang and northwest and to network the control effects of second channel many FACTS equipment coordination control strategy for voltage.Second channel networking schematic diagram as shown in Figure 7.
First, investigation Xinjiang and northwest Major Networks second channel many FACTS equipment internal layer coordination control strategy, for the control effects of voltage, calculate example and adopt summer in 2013 large mode layout data.The control voltage desired value V at Sha Zhouzhan, fish card station is set
1=775kV, V
2=770kV, husky state busbar voltage control cincture is [770kV, 780kV], and fish card busbar voltage control cincture is [765kV, 775kV].Consider that Dunhuang and Jiuquan wind-powered electricity generation evenly fluctuate to 3300MW from 0MW, every 300MW one-level, during wind-powered electricity generation fluctuation, utilize Qinghai hydroelectric peak to maintain the power-balance of system.In emulation, wind-powered electricity generation initially exert oneself 0MW time, it is idle that the arrangement of two passages each FACTS equipment sends maximum inductive, namely husky state ~ fish blocks four groups of controlled high resistances of circuit and is arranged in heap(ed) capacity 390Mvar, husky station, state SVC is arranged in perceptual heap(ed) capacity 360Mvar, the controlled high resistance of the fish card magnet controlled bus in station is arranged in heap(ed) capacity 330Mvar, and perception is "+", and capacitive is "-".According to described internal layer control strategy, the inner two groups of circuit controlled high resistance action situations in husky station, state as shown in Figure 7, the inner two groups of circuit controlled high resistance action situations in fish card station as shown in Figure 8, as shown in Figure 9, the fish card magnet controlled bus in station controlled high resistance action situation as shown in Figure 10 for husky station, state SVC action situation.Sha Zhouzhan and 750kV side, fish card station change in voltage situation are as shown in figure 11.As can be seen from the figure, the controlled high resistance of husky state circuit 1, controlled high resistance 2 alternating movement, fish blocks controlled high resistance 1, controlled high resistance 2 alternating movement, controlled high resistance each action one-level.When after controlled high resistance action, husky state SVC, fish block the controlled high resistance of magnet controlled bus and will occur oppositely regulating, by voltage control in desired value.In Fig. 9, as wind power output 2400MW, 3000MW, 3300MW, oppositely regulating appears in SVC.In Figure 10, as wind power output 1800MW, 2400MW, oppositely regulating appears in the controlled high resistance of magnet controlled bus.
As wind power output 0MW ~ 1500MW, what only rely on husky state station SVC and fish card station magnet controlled bus controlled high resistance follows pressure regulation, can by Sha Zhouzhan, fish card station voltage control in desired value.As wind power output 1800MW, husky state voltage is in control range, and fish card voltage is lower than 765kV, and fish blocks one group of controlled high resistance action one-level.As wind power output 2100MW, 2700MW, Sha Zhouyi group circuit controlled high resistance action one-level, Sha Zhou and fish card voltage can return in control range, and the controlled high resistance of fish card circuit is without the need to action.As wind power output 2400MW, 3300MW, after the controlled high resistance action in husky state one-level, but fish card voltage is lower than 765kV, and fish blocks controlled high resistance action one-level.As wind power output 3000MW, after Sha Zhouyi group circuit controlled high resistance action one-level, husky state voltage is still lower than 770kV, another group controlled high resistance of circuit of husky state action one-level again, husky state voltage resume is in control range, and fish card voltage is still lower than 765kV, and fish blocks one group of controlled high resistance action one-level.Take described many FACTS equipment internal layer coordination control strategy, husky state voltage can accurately control at 775kV, fish card voltage can accurately control at 770kV when wind-powered electricity generation fluctuation 0 ~ 2400MW, and fish card voltage can control when wind-powered electricity generation fluctuates 2700MW ~ 3300MW in [765kV, 770kV] scope.
Secondly, investigation Xinjiang and the outer coordination control strategy of northwest Major Networks second channel many FACTS equipment, for the control effects of voltage, calculate example and adopt summer in 2013 large basal profile layout data.Arranging outer voltage-controlled up-and-down boundary is default value, gets U
1=803kV, U
2=745kV.In emulation, husky state ~ controlled high resistance in four groups, fish card circuit both sides all drops into heap(ed) capacity 390Mvar, and husky state SVC capacity is 0Mvar, and fish blocks the controlled high resistance of magnet controlled bus and drops into heap(ed) capacity 330Mvar.After Dunhuang ~ Jiuquan N-2 fault, Sha Zhouzhan, the busbar voltage change of fish card station are as shown in Figure 12,13.Xinjiang and the northwest change in voltage that second channel respectively stands along the line of networking is as shown in table 1 below.After fault, husky state voltage is 736kV, and fish card voltage is 709kV.That considers SVC follows pressure regulation effect, husky state voltage resume is to 750kV, fish card voltage resume is to 720kV, and fish card voltage, still lower than outer voltage control lower limit 745kV, starts outer control, two groups, the fish card side controlled high resistance of circuit all excises one-level, fish card voltage resume, to 734kV, still lower than 745kV, starts next round skin and controls, two groups, the fish card side controlled high resistance of circuit excises one-level again, and fish card voltage resume is to 748kV.
Table 1
Finally, investigation Xinjiang and northwest Major Networks second channel many FACTS equipment outermost layer coordination control strategy, for the control effects of voltage, calculate example and adopt winter in 2013 large limit mode layout data.Wherein, Dunhuang wind power integration 3200MW, Jiuquan wind power integration 1000MW.Arranging the voltage-controlled coboundary of outermost layer is default value, gets U'=830kV.In emulation, husky state SVC capacity is 0Mvar, and husky state ~ controlled high resistance in four groups, fish card circuit both sides all drops into the controlled capacity 117Mvar of capacity 156Mvar(fixed capacity 39Mvar+1 level).Arrange Jiuquan wind energy turbine set and collect side Yumen ~ the Jiayu Pass three N-1 fault forever, 4200MW wind-powered electricity generation whole off-grid in Gansu after simulated failure, the change in voltage situation at Sha Zhouzhan and fish card station as shown in Figure 14 and Figure 15.After wind-powered electricity generation off-grid, consider that SVC follows pressure regulation effect, Sha Zhou and fish card ceiling voltage still reach on 830kV, and start outermost layer control strategy, Sha Zhouzhan and two groups, the fish card station controlled high resistance of circuit are all thrown to heap(ed) capacity 390Mvar.After controlled high resistance action, voltage can return in zone of reasonableness, and husky state voltage resume is to 790kV, and fish card voltage resume is to 790kV.After the off-grid fault caused after dynamic passive compensation device action, each station change in voltage is as shown in table 2 below.
Table 2
| Voltage/(kV) | Dunhuang | Jiuquan | Sha Zhou | Fish blocks | Qaidam |
| Initially | 768 | 770 | 782 | 787 | 780 |
| After wind-powered electricity generation off-grid, SVC and controlled high resistance are all failure to actuate | 830 | 810 | 840 | 850 | 845 |
| Only SVC action after wind-powered electricity generation off-grid | 815 | 800 | 820 | 835 | 835 |
| SVC and the equal action of controlled high resistance after wind-powered electricity generation off-grid | 790 | 790 | 790 | 790 | 800 |
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. a FACTS equipment coordination control method for new forms of energy delivery system, is characterized in that: described method comprises internal layer control, outer control and outermost layer and controls; Described internal layer controls transformer substation voltage accurately to control in voltage-target or voltage control band; When large disturbances appears in new forms of energy delivery system, outer control and outermost layer control to provide urgent reactive power support, and transformer substation voltage is returned to rapidly in allowed band;
Described new forms of energy delivery system is Xinjiang and northwest Major Networks second channel, and wind-powered electricity generation and solar energy are sent outside by passage of networking, and described networking passage installs FACTS equipment; Wherein, become tertiary winding side installing 66kV Static Var Compensator the husky state station owner that networking passage is along the line, at fish card station, bus bar side installs the controlled high resistance of magnet controlled bus, in Sha Zhou ~ controlled high resistance of fish card double-circuit line both sides installing stagewise;
Described skin controls to stand busbar voltage for input variable with shoal station/fish card, input outer voltage coboundary U1 and outer voltage lower boundary U2, outer voltage coboundary U1 and outer voltage lower boundary U2 and determined by user; Outer control Real-Time Monitoring voltage, when occurring large disturbance in new forms of energy delivery system, continuous 5s monitors busbar voltage at [U2, U1] outside, now dynamic adjustments is complete within the monitoring time of 5s for Static Var Compensator and the controlled high resistance of magnet controlled bus, reach its maximum/minimum capacity, now shoal station/fish card station controlled high resistance I of internal classification formula and the controlled high resistance II of stagewise are excised simultaneously or drop into a level capacity, then start to circulate timing next time;
When generating region internal fault, i.e. husky state ~ fish card line fault, then preferential electro-magnetic transient controls; If within the monitoring time of 5s, shoal station/fish card station tuning controller and the controlled high resistance of stagewise receive husky state ~ fish card circuit relay and protect outlet signal or circuit breaker position contact point signal, then locking skin controls, start electro-magnetic transient control strategy, controlled for both sides stagewise high resistance is thrown to heap(ed) capacity, after electro-magnetic transient control terminates, go back to outer control.
2. the FACTS equipment coordination control method of new forms of energy delivery system according to claim 1, is characterized in that: during described internal layer controls, internal layer voltage control was every 1 minute circulation primary; Sha Zhouzhan and fish card station internal layer control to arrange time delay 30s, to avoid Sha Zhouzhan and the action simultaneously of the controlled high resistance of fish card station track road stagewise.
3. the FACTS equipment coordination control method of new forms of energy delivery system according to claim 2, is characterized in that: described internal layer voltage control for input variable, inputs station, husky state control voltage desired value V with shoal station/fish card station busbar voltage
1, fish card station control voltage desired value V
2, station, husky state busbar voltage control cincture [V
1-Δ V
1, V
1+ Δ V
1] and fish card station busbar voltage control cincture [V
2-Δ V
2, V
2+ Δ V
2], Δ V
1with Δ V
2be respectively the busbar voltage deviation of Sha Zhouzhan and the station permission of fish card, V
1, V
2, Δ V
1with Δ V
2numerical value determined by user.
4. the FACTS equipment coordination control method of new forms of energy delivery system according to claim 3, it is characterized in that: during internal layer voltage control, the trailing type regulating action of preferential performance Static Var Compensator, the controlled high resistance of magnet controlled bus, controls at V respectively by husky state station busbar voltage and fish card station busbar voltage
1and V
2; When Static Var Compensator, magnet controlled controlled high resistance have reached maximum/minimum capacity, Sha Zhouzhan/fish card station busbar voltage is not still in Sha Zhouzhan/fish card station busbar voltage control cincture, and now station, husky state/fish blocks the controlled high resistance trigger action of stagewise in station; For reducing equipment loss, when controlled high resistance controls to trigger, the controlled high resistance I of station, husky state stagewise and II alternating movement, the controlled high resistance I of fish card station track road stagewise and II alternating movement, each action one-level;
When after Sha Zhouzhan/one group, fish card station stagewise controlled high resistance I action one-level, if monitoring busbar voltage is not still when allowing in voltage control band, then send out triggering command to the controlled high resistance II of another group stagewise of our station, stagewise controlled high resistance II action one-level, if now stagewise controlled high resistance II fault or reached maximum/minimum capacity, then send out triggering command to the controlled high resistance I of stagewise, the controlled high resistance I of stagewise action one-level again;
When Sha Zhouzhan/one group, fish card station controlled high resistance I of stagewise needs action, but due to stagewise controlled high resistance I faults itself or reached maximum/minimum capacity, then send out triggering command to the controlled high resistance II of another group stagewise of our station, stagewise controlled high resistance II action one-level, after stagewise controlled high resistance II action one-level, if monitoring busbar voltage is not still when allowing in voltage control band, then the controlled high resistance II of stagewise needs action one-level again.
5. the FACTS equipment coordination control method of new forms of energy delivery system according to claim 1, it is characterized in that: described outermost layer voltage control stands busbar voltage for input variable with Sha Zhouzhan/fish card, input outermost layer voltage control upper limit U', the numerical value of U' is determined by user; Outermost layer voltage control real-time monitoring system voltage, once monitor voltage higher than two groups of controlled high resistances of stagewise action immediately in U', Sha Zhouzhan/fish card station to heap(ed) capacity, to suppress system high pressure.
6. the FACTS equipment coordination control method of new forms of energy delivery system according to claim 1, is characterized in that: described outermost layer controls priority and controls higher than skin, and the outer priority that controls controls higher than internal layer.
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| CN105610175B (en) * | 2016-01-22 | 2020-06-30 | 国家电网公司 | Wide-area reactive power coordination control method for FACTS equipment |
| CN105958503A (en) * | 2016-06-13 | 2016-09-21 | 成都欣维保科技有限责任公司 | Operation method for reactive intelligent adjustment power transmission system |
| CN105958502A (en) * | 2016-06-13 | 2016-09-21 | 成都欣维保科技有限责任公司 | Reactive automatic regulation method for intelligent power transmission system |
| CN106208096B (en) * | 2016-07-21 | 2018-09-21 | 国网河北省电力公司电力科学研究院 | A kind of Substation Reactive-power Compensation grading method |
| CN112162509B (en) * | 2020-09-25 | 2024-01-02 | 中国直升机设计研究所 | Active control rotor real-time control system based on FPGA+CPU architecture |
| CN112653156B (en) * | 2021-01-05 | 2024-03-12 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Coordination control method between line controllable high reactance and static synchronous compensator |
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