CN102904287A - 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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- CN102904287A CN102904287A CN2012103693756A CN201210369375A CN102904287A CN 102904287 A CN102904287 A CN 102904287A CN 2012103693756 A CN2012103693756 A CN 2012103693756A CN 201210369375 A CN201210369375 A CN 201210369375A CN 102904287 A CN102904287 A CN 102904287A
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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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- 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
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 the FACTS equipment coordination control method that a kind of new forms of energy are sent system outside.
Background technology
Along with Xinjiang and northwest major network networking second channel builds up, will form first passage-second channel-extra large western passage total length near 750 kilovolts of dual-ring networks of 3000 kilometers.String has Jiuquan, two ten million multikilowatt large-scale wind electricity bases, Hami and Hai Xi photovoltaic base on this passage.These regional new energy developments present on a large scale, high concentrated, remote characteristics, and development rapidly.Along with the extensive feed-in of new forms of energy, wind power on a large scale, the fluctuation of high frequency causes on two passages of Xinjiang and northwest networking the trend fluctuation frequent, the reactive power/voltage control difficulty.Adopt conventional low-pressure reactive compensation equipment can't satisfy the requirement of frequent switching, need to adopt dynamic passive compensation equipment.According to the planning demonstration, Xinjiang and the novel FACTS device of northwest networking second channel planning installing many covers capacity.Wherein, husky state ~ fish card two loop line roads dispose 4 groups of circuit stagewise controlled reactors altogether, every pool-size 390Mvar, and fixed capacity 39Mvar, variable capacity 351Mvar, three grades are adjustable, single capacity 117Mvar; Station, husky state transformer tertiary winding side configuration Static Var Compensator SVC(360Mvar capacitive, the 360Mvar perception); The controlled high resistance of fish card station bus bar configuration 330Mvar magnetic valve type bus, fixed capacity is 16.5Mvar, and is adjustable continuously.
At present, the independently domestic existing research of control strategy of 750kV controlled reactor and SVC, but the coordination control strategy between many FACTS equipment still belongs to blank at home.China's controlled high resistance demonstration project in station, 750kV Dunhuang is the controlled high resistance engineering that the world's first cover 750kV wind-powered electricity generation concentrates transmitting system to use, and this project successfully put into operation on January 5th, 2012.For Dunhuang 750kV controlled reactor, proposed of China DianKeYuan system is based on double-deck control strategy inside and outside the controlled reactor of reactive requirement increment and bus boundary voltage, use in the control strategy reality good, for suppress the busbar voltage fluctuation, reduce the circuit reactive loss, in transient process, realize the busbar voltage dynamic support, reduce the action frequency of low-voltage reactive compensator capable in the station and alleviate stand in aspect the operating pressure effect obvious.Static Var Compensator SVC has been widely used in middle high-pressure electrical network and the supergrid at present, and has accumulated operating experience for many years as the effective means of reactive power compensation, inhibition voltage fluctuation.The security and stability that provides urgent reactive power compensation to support to improve electrical network to strengthen line voltage for electrical network in the transient process, the simultaneously normality fluctuation that provides continuous reactive power to regulate to suppress voltage in service are provided after fault SVC.The general control strategy that adopts based on voltage of SVC, by continuous adjusting, it is constant to keep SVC place busbar voltage.
Xinjiang and northwest major network networking second channel are installed the controlled high resistance of 5 cover 750kV, 1 cover 66kV SVC altogether, are in the world first at 750kV transmission system pooled applications novel high-capacity FACTS equipment.Realize the coordination optimization control between the coordination optimization control between the controlled high resistance group, controlled high resistance and the SVC, very crucial for the two passage transmission system reactive voltage frequent fluctuation that establishment causes owing to new forms of energy fluctuate.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of new forms of energy and send the FACTS equipment coordination control method of system outside, be divided into internal layer control, outer control and outermost layer control, wherein, outermost layer control priority is higher than outer control, and outer control priority is higher than internal layer control.Internal layer control guarantees that transformer substation voltage can accurately be controlled in certain value or certain scope, and outer control and outermost layer are controlled at urgent reactive power support is provided when large disturbance appears in system, guarantees that transformer substation voltage can return in the allowed band rapidly.The method of three layers of voltage control combination can high accuracy, concentrate efficiently and coordinate a plurality of FACTS device actions of control, and engineering adaptability is very strong.
In order to realize the foregoing invention purpose, the present invention takes following technical scheme:
The invention provides a kind of new forms of energy and send the FACTS equipment coordination control method of system outside, described method comprises internal layer control, outer control and outermost layer control; Described internal layer control accurately is controlled at transformer substation voltage in voltage-target or the voltage control band; Outer control and outermost layer are controlled urgent reactive power support are provided when new forms of energy are sent system outside and large disturbance occurred, and transformer substation voltage can be returned in the allowed band rapidly.
It is Xinjiang and northwest major network networking second channel that described new forms of energy are sent system outside, and wind-powered electricity generation and solar energy are sent outside by the networking passage, installing FACTS equipment on the described networking passage; Wherein, become tertiary winding side installing 66kV Static Var Compensator networking passage husky state station owner along the line, bus bar side is installed the controlled high resistance of magnet controlled bus at fish card power switch station, in Sha Zhou～controlled high resistance of fish card circuit double-circuit line both sides installing stagewise.
In the described internal layer control, the internal layer voltage control was every 1 minute circulation primary; Sha Zhouzhan and the control of fish card station internal layer arrange time delay 30s, move simultaneously to avoid Sha Zhouzhan and the controlled high resistance of fish card station track road stagewise.
Described internal layer voltage control is inputted station, husky state control voltage-target V take substation bus bar voltage as input variable
1, fish card station control voltage-target V
2, husky state busbar voltage control band [V
1-Δ V
1, V
1+ Δ V
1] and fish card busbar voltage control band [V
2-Δ V
2, V
2+ Δ V
2], Δ V
1With Δ V
2Be respectively the busbar voltage deviation that Sha Zhouzhan and fish card station allow, V
1, V
2, Δ V
1With Δ V
2Numerical value determined by the user.
During the internal layer voltage control, preferentially bring into play the trailing type regulating action of husky state Static Var Compensator, the magnet controlled controlled high resistance of fish card, husky state station voltage and fish card station voltage are controlled at respectively V
1And V
2When Static Var Compensator, magnet controlled controlled high resistance have reached maximum/minimum capacity, husky state/fish card busbar voltage still not in the voltage control band, the controlled high resistance trigger action of circuit in this moment station; Be to reduce equipment loss, when controlled high resistance control triggers, the husky state controlled high resistance I in station track road and II alternating movement, one-level is moved in the fish card station track controlled high resistance I in road and II alternating movement at every turn;
After one group of controlled high resistance I of circuit in the station moves one-level, if the monitoring busbar voltage is not still in allowing the voltage control band time, 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 this moment controlled high resistance II fault or reached maximum/minimum capacity, then sending out triggering command moves one-level for controlled high resistance I, controlled high resistance I again;
One group of controlled high resistance I of circuit needs action in the station, but because 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 the controlled high resistance II action one-level, if the monitoring busbar voltage is not still in allowing the voltage control band time, then controlled high resistance II need to be moved one-level again.
Described outer control is inputted outer voltage coboundary U take substation bus bar voltage as input variable
1With outer voltage lower boundary U
2, outer voltage coboundary U
1With outer voltage lower boundary U
2Determined by the user; Outer control Real-Time Monitoring voltage, when new forms of energy are sent the large disturbance of appearances in the system outside, continuous 5s monitors busbar voltage at [U
2, U
1] outside, a level capacity is excised or dropped into to two groups of controlled high resistance I of circuit and controlled high resistance II simultaneously in standing, dynamic adjustments is complete within the monitoring time of 5s for Static Var Compensator and magnet controlled controlled high resistance at this moment, reach its maximum/minimum capacity, after the controlled high resistance action of circuit is complete, begin again the timing that next time circulates;
When the generating region internal fault, i.e. husky state～fish card line fault, then preferential electro-magnetic transient control; If within the monitoring time of 5s, 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 in standing, the then outer control of locking, start the electro-magnetic transient control strategy, circuit controlled high resistance in both sides is thrown to heap(ed) capacity, after electro-magnetic transient control finishes, go back to outer control.
Described outermost layer voltage control is inputted outermost layer voltage control upper limit U' take substation bus bar voltage as input variable, and the numerical value of U' is determined by the user; Outermost layer voltage control real-time monitoring system voltage is higher than U' in case monitor voltage, and two groups of controlled high resistances of circuit stagewise are moved immediately to heap(ed) capacity in standing, to suppress system high pressure.
Described outermost layer control priority is higher than outer control, and outer control priority is higher than internal layer control.
Compared with prior art, beneficial effect of the present invention is:
1. method of the present invention is directly take voltage as control target, explicit physical meaning, simple, intuitive.
2. the present invention is with the FACTS equipment (comprising Static Var Compensator and the controlled high resistance of magnet controlled bus) of continuous voltage regulating and the controlled high resistance effective coordination of circuit of classification action.When the wind power fluctuation caused that system voltage changes, continuous voltage regulating equipment preferentially moved, and brings into play it and follows voltage regulation function, and voltage accurately is controlled at desired value.When continuous voltage regulating equipment has been adjusted to maximum/minimum capacity, when transformer substation voltage still runawayed, the controlled high resistance of stagewise circuit this moment was moved again, with voltage control in the reasonable scope.What control method was given full play to SVC, the controlled high resistance of magnet controlled bus follows voltage regulation function continuously, has avoided the frequent movement of the controlled high resistance of stagewise, significantly improves operation precision and the utilization ratio of each FACTS equipment.
3. the present invention adopts three layers of voltage control, and outermost layer control has precedence over outer control, and outer control has precedence over internal layer control, and the controlled high resistance of stagewise is taked different action principles in the different key-courses.In the internal layer control, allow the one group of controlled high resistance action of stagewise one-level in the transformer station at every turn; In the outer control, allow in the transformer station two groups of controlled high resistances of stagewise to move simultaneously one-level at every turn; In the outermost layer control, allow in the transformer station two groups of controlled high resistances of stagewise to move to heap(ed) capacity simultaneously at every turn.Take the controlled high resistance of different stagewises action principle, both can when internal layer is controlled, reduce the action frequency of controlled high resistance and to the impact of system, can when skin control and outermost layer are controlled, provide urgent reactive power support for system again.The method that three layers of control combines provides guarantee so that controlled high resistance action reasonability significantly improves for controlled high resistance plays a role in the transmission system that extensive new forms of energy are sent outside, have broad application prospects.
Description of drawings
Fig. 1 is the FACTS equipment coordination control method schematic diagram that new forms of energy are sent system outside;
Fig. 2 is the outer control strategy schematic diagram in station, husky state in the embodiment of the invention;
Fig. 3 is the outer control strategy schematic diagram in fish card station in the embodiment of the invention;
Fig. 4 is station, husky state outermost layer control strategy schematic diagram in the embodiment of the invention;
Fig. 5 is fish card station outermost layer control strategy schematic diagram in the embodiment of the invention;
Fig. 6 is Xinjiang and northwest major network networking second channel schematic diagram in the embodiment of the 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 fluctuateed in the embodiment of the invention;
Fig. 8 is the controlled high resistance action diagram in summer in 2013 large mode leeward electricity even fluctuation macrura reevesii card side line road in the embodiment of the invention;
Fig. 9 is husky state SVC action diagram when the summer in 2013, large mode leeward electricity evenly fluctuateed in the embodiment of the invention;
Figure 10 is the controlled high resistance action diagram of summer in 2013 large mode leeward electricity even fluctuation macrura reevesii card bus in the embodiment of the invention;
Figure 11 is husky station, state and fish card station 750kV side change in voltage figure (kV) when the summer in 2013, large mode leeward electricity evenly fluctuateed in the embodiment of the invention;
Figure 12 is station, husky state change in voltage figure (kV) after Dunhuang ~ Jiuquan circuit N-2 fault under the large basic mode of summer in 2013 in the embodiment of the invention;
Figure 13 is fish card station change in voltage figure (kV) after Dunhuang ~ Jiuquan circuit N-2 fault under the large basic mode of summer in 2013 in the embodiment of the invention;
Figure 14 is station, husky state change in voltage figure (kV) behind the wind-powered electricity generation off-grid of Gansu under the large limit mode of winter in 2013 in the embodiment of the invention;
Figure 15 is fish card station change in voltage figure (kV) behind the wind-powered electricity generation off-grid of Gansu under the large limit mode of winter in 2013 in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Such as Fig. 1, the invention provides the FACTS equipment coordination control method that a kind of new forms of energy are sent system outside, described method comprises internal layer control, outer control and outermost layer control; Described internal layer control accurately is controlled at transformer substation voltage in voltage-target or the voltage control band; Outer control and outermost layer are controlled urgent reactive power support are provided when new forms of energy are sent system outside and large disturbance occurred, and transformer substation voltage can be returned in the allowed band rapidly.
In the described internal layer control, the internal layer voltage control was every 1 minute circulation primary; Sha Zhouzhan and the control of fish card station internal layer arrange time delay 30s, move simultaneously to avoid Sha Zhouzhan and the controlled high resistance of fish card station track road stagewise.
Described internal layer voltage control is inputted station, husky state control voltage-target V take substation bus bar voltage as input variable
1, fish card station control voltage-target V
2, husky state busbar voltage control band [V
1-Δ V
1, V
1+ Δ V
1] and fish card busbar voltage control band [V
2-Δ V
2, V
2+ Δ V
2], Δ V
1With Δ V
2Be respectively the busbar voltage deviation that Sha Zhouzhan and fish card station allow, V
1, V
2, Δ V
1With Δ V
2Numerical value determined by the user.
During the internal layer voltage control, preferentially bring into play the trailing type regulating action of husky state Static Var Compensator, the magnet controlled controlled high resistance of fish card, husky state station voltage and fish card station voltage are controlled at respectively V
1And V
2When Static Var Compensator, magnet controlled controlled high resistance have reached maximum/minimum capacity, husky state/fish card busbar voltage still not in the voltage control band, the controlled high resistance trigger action of circuit in this moment station; Be to reduce equipment loss, when controlled high resistance control triggers, the husky state controlled high resistance I in station track road and II alternating movement, one-level is moved in the fish card station track controlled high resistance I in road and II alternating movement at every turn;
After one group of controlled high resistance I of circuit in the station moves one-level, if the monitoring busbar voltage is not still in allowing the voltage control band time, 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 this moment controlled high resistance II fault or reached maximum/minimum capacity, then sending out triggering command moves one-level for controlled high resistance I, controlled high resistance I again;
One group of controlled high resistance I of circuit needs action in the station, but because 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 the controlled high resistance II action one-level, if the monitoring busbar voltage is not still in allowing the voltage control band time, then controlled high resistance II need to be moved one-level again.
Such as Fig. 2 and Fig. 3, described outer control is inputted outer voltage coboundary U take substation bus bar voltage as input variable
1With outer voltage lower boundary U
2, outer voltage coboundary U
1With outer voltage lower boundary U
2Determined by the user; Outer control Real-Time Monitoring voltage, when new forms of energy are sent the large disturbance of appearances in the system outside, continuous 5s monitors busbar voltage at [U
2, U
1] outside, a level capacity is excised or dropped into to two groups of controlled high resistance I of circuit and controlled high resistance II simultaneously in standing, dynamic adjustments is complete within the monitoring time of 5s for Static Var Compensator and magnet controlled controlled high resistance at this moment, reach its maximum/minimum capacity, after the controlled high resistance action of circuit is complete, begin again the timing that next time circulates;
When the generating region internal fault, i.e. husky state～fish card line fault, then preferential electro-magnetic transient control; If within the monitoring time of 5s, 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 in standing, the then outer control of locking, start the electro-magnetic transient control strategy, circuit controlled high resistance in both sides is thrown to heap(ed) capacity, after electro-magnetic transient control finishes, go back to outer control.
Such as Fig. 4 and Fig. 5, described outermost layer voltage control is inputted outermost layer voltage control upper limit U' take substation bus bar voltage as input variable, and the numerical value of U' is determined by the user; Outermost layer voltage control real-time monitoring system voltage is higher than U' in case monitor voltage, and two groups of controlled high resistances of circuit stagewise are moved immediately to heap(ed) capacity in standing, to suppress system high pressure.
Such as Fig. 6, it is Xinjiang and northwest major network networking second channel that described new forms of energy are sent system outside, and wind-powered electricity generation and solar energy are sent outside by the networking passage, installing FACTS equipment on the described networking passage; Wherein, become tertiary winding side installing 66kV Static Var Compensator networking passage husky state station owner 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 the control strategy simulation calculation based on the BPA flow calculation program, investigate the institute Xinjiang of putting forward and the northwest control effect of many FACTS of second channel equipment coordination control strategy for voltage of networking.Second channel networking schematic diagram as shown in Figure 7.
At first, investigate many FACTS of Xinjiang and northwest major network networking second channel equipment internal layer coordination control strategy for the control effect of voltage, calculate example and adopt large mode layout data of summer in 2013.The control voltage-target V at Sha Zhouzhan, fish card station is set
1=775kV, V
2=770kV, husky state busbar voltage control band is [770kV, 780kV], fish card busbar voltage control band is [765kV, 775kV].Consider that Dunhuang and Jiuquan wind-powered electricity generation evenly fluctuate to 3300MW from 0MW, every 300MW one-level utilizes the Qinghai hydroelectric peak to keep the power-balance of system during the wind-powered electricity generation fluctuation.In the emulation, when wind-powered electricity generation is initially exerted oneself 0MW, it is idle that maximum inductive is sent in each the FACTS equipment arrangement of two passages, be that husky state ~ four groups of controlled high resistances of circuit of fish card are arranged in heap(ed) capacity 390Mvar, husky state station SVC is arranged in perceptual heap(ed) capacity 360Mvar, the controlled high resistance of the magnet controlled bus in fish card station is arranged in heap(ed) capacity 330Mvar, and perception is "+", and capacitive is "-".According to described internal layer control strategy, the controlled high resistance action of the inner two groups of circuits in station, husky state situation as shown in Figure 7, the controlled high resistance action of the inner two groups of circuits in fish card station situation as shown in Figure 8, husky state station SVC moves situation as shown in Figure 9, and the controlled high resistance action of the magnet controlled bus in fish card station situation as shown in figure 10.Sha Zhouzhan and fish card station 750kV side change in voltage situation are as shown in figure 11.As can be seen from the figure, the controlled high resistance 1 of husky state circuit, 2 alternating movements of controlled high resistance, the controlled high resistance 1 of fish card, 2 alternating movements of controlled high resistance, controlled high resistance is only moved one-level at every turn.After the action of controlled high resistance, oppositely adjusting will appear in husky state SVC, the controlled high resistance of the magnet controlled bus of fish card, with voltage control in desired value.Among Fig. 9, when wind-powered electricity generation was exerted oneself 2400MW, 3000MW, 3300MW, oppositely regulating appearred in SVC.Among Figure 10, when wind-powered electricity generation was exerted oneself 1800MW, 2400MW, oppositely regulating appearred in the controlled high resistance of magnet controlled bus.
When wind-powered electricity generation is exerted oneself 0MW ~ 1500MW, only rely on the pressure regulation of following of the controlled high resistance of the magnet controlled bus of husky state station SVC and fish card station, can be with Sha Zhouzhan, fish card station voltage control in desired value.As the wind-powered electricity generation 1800MW that exerts oneself, husky state voltage is in control range, and fish card voltage is lower than 765kV, one group of controlled high resistance action one-level of fish card.When wind-powered electricity generation is exerted oneself 2100MW, 2700MW, the controlled high resistance action of Sha Zhouyi group circuit one-level, Sha Zhou and fish card voltage can both return in the control range, and the controlled high resistance of fish card circuit need not action.When wind-powered electricity generation was exerted oneself 2400MW, 3300MW, after the controlled high resistance action in the husky state one-level, but fish card voltage was lower than 765kV, the controlled high resistance action of fish card one-level.When wind-powered electricity generation was exerted oneself 3000MW, after the controlled high resistance action of the Sha Zhouyi group circuit one-level, husky state voltage still was lower than 770kV, the husky state controlled high resistance of another group circuit is moved one-level again, husky state voltage returns in the control range, and fish card voltage still is lower than 765kV, one group of controlled high resistance action one-level of fish card.Take described many FACTS equipment internal layer coordination control strategy, husky state voltage can accurately be controlled at 775kV, fish card voltage can accurately be controlled at 770kV when wind-powered electricity generation fluctuation 0 ~ 2400MW, fish card voltage can be controlled in [765kV, 770kV] scope when wind-powered electricity generation fluctuates 2700MW ~ 3300MW.
Secondly, investigate the outer coordination control strategy of Xinjiang and northwest major network networking second channel many FACTS equipment for the control effect of voltage, calculate example and adopt large basic mode layout data of summer in 2013.It is default value that outer voltage-controlled up-and-down boundary is set, and gets U
1=803kV, U
2=745kV.In the emulation, husky state ~ four groups of controlled high resistances in fish card circuit both sides all drop into heap(ed) capacity 390Mvar, and husky state SVC capacity is 0Mvar, and the controlled high resistance of the magnet controlled bus of fish card drops into heap(ed) capacity 330Mvar.After Dunhuang ~ Jiuquan N-2 fault, Sha Zhouzhan, fish card station busbar voltage change shown in Figure 12,13.The change in voltage at Xinjiang and networking second channel each station along the line, northwest is as shown in table 1 below.Husky state voltage is 736kV after the fault, and fish card voltage is 709kV.Consider the pressure regulation effect of following of SVC, husky state voltage returns to 750kV, fish card voltage returns to 720kV, and fish card voltage still is lower than outer voltage control lower limit 745kV, starts outer control, two groups of controlled high resistances of circuit of fish card side are all excised one-level, fish card voltage returns to 734kV, still is lower than 745kV, starts the outer control of next round, two groups of controlled high resistances of circuit of fish card side are excised one-level again, and fish card voltage returns to 748kV.
Table 1
At last, investigate many FACTS of Xinjiang and northwest major network networking second channel equipment outermost layer coordination control strategy for the control effect of voltage, calculate example and adopt winter in 2013 large limit mode layout data.Wherein, Dunhuang wind-powered electricity generation access 3200MW, Jiuquan wind-powered electricity generation access 1000MW.It is default value that the voltage-controlled coboundary of outermost layer is set, and gets U'=830kV.In the emulation, husky state SVC capacity is 0Mvar, and husky state ~ four groups of controlled high resistances in fish card circuit both sides all drop into the controlled capacity 117Mvar of capacity 156Mvar(fixed capacity 39Mvar+1 level).Jiuquan wind energy turbine set is set compiles forever N-1 fault of side Yumen ~ the Jiayu Pass three, 4200MW wind-powered electricity generation whole off-grids in Gansu after the simulated failure, change in voltage situation such as the Figure 14 and shown in Figure 15 at Sha Zhouzhan and fish card station.Behind the wind-powered electricity generation off-grid, consider that SVC follows the pressure regulation effect, Sha Zhou and fish card ceiling voltage still reach on the 830kV, start the outermost layer control strategy, and the two groups of controlled high resistances of circuit in Sha Zhouzhan and fish card station are all thrown to heap(ed) capacity 390Mvar.Voltage can return in the zone of reasonableness after the controlled high resistance action, and husky state voltage returns to 790kV, and fish card voltage returns to 790kV.The change in voltage of respectively standing after the off-grid fault that causes behind the dynamic passive compensation device action is as shown in table 2 below.
Table 2
| Voltage/(kV) | Dunhuang | Jiuquan | Husky state | The fish card | The Qaidam |
| Initially | 768 | 770 | 782 | 787 | 780 |
| SVC and controlled high resistance all are failure to actuate behind the wind-powered electricity generation off-grid | 830 | 810 | 840 | 850 | 845 |
| Only SVC action behind the wind-powered electricity generation off-grid | 815 | 800 | 820 | 835 | 835 |
| SVC and controlled high resistance are all moved behind the wind-powered electricity generation off-grid | 790 | 790 | 790 | 790 | 800 |
Should be noted that at last: 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 the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. new forms of energy are sent the FACTS equipment coordination control method of system outside, it is characterized in that: described method comprises internal layer control, outer control and outermost layer control; Described internal layer control accurately is controlled at transformer substation voltage in voltage-target or the voltage control band; Outer control and outermost layer are controlled urgent reactive power support are provided when new forms of energy are sent system outside and large disturbance occurred, and transformer substation voltage can be returned in the allowed band rapidly.
2. new forms of energy according to claim 1 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: it is Xinjiang and northwest major network networking second channel that described new forms of energy are sent system outside, wind-powered electricity generation and solar energy are sent outside by the networking passage, installing FACTS equipment on the described networking passage; Wherein, become tertiary winding side installing 66kV Static Var Compensator networking passage husky state station owner along the line, bus bar side is installed the controlled high resistance of magnet controlled bus at fish card power switch station, in Sha Zhou～controlled high resistance of fish card double-circuit line both sides installing stagewise.
3. new forms of energy according to claim 1 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: in the described internal layer control, the internal layer voltage control was every 1 minute circulation primary; Sha Zhouzhan and the control of fish card station internal layer arrange time delay 30s, move simultaneously to avoid Sha Zhouzhan and the controlled high resistance of fish card station track road stagewise.
4. new forms of energy according to claim 3 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: described internal layer voltage control is inputted station, husky state control voltage-target V take substation bus bar voltage as input variable
1, fish card station control voltage-target V
2, husky state busbar voltage control band [V
1-Δ V
1, V
1+ Δ V
1] and fish card busbar voltage control band [V
2-Δ V
2, V
2+ Δ V
2], Δ V
1With Δ V
2Be respectively the busbar voltage deviation that Sha Zhouzhan and fish card station allow, V
1, V
2, Δ V
1With Δ V
2Numerical value determined by the user.
5. new forms of energy according to claim 4 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: during the internal layer voltage control, the trailing type regulating action of the husky state of preferential performance Static Var Compensator, the magnet controlled controlled high resistance of fish card is controlled at respectively V with husky state station voltage and fish card station voltage
1And V
2When Static Var Compensator, magnet controlled controlled high resistance have reached maximum/minimum capacity, husky state/fish card busbar voltage still not in the voltage control band, the controlled high resistance trigger action of circuit in this moment station; Be to reduce equipment loss, when controlled high resistance control triggers, the husky state controlled high resistance I in station track road and II alternating movement, one-level is moved in the fish card station track controlled high resistance I in road and II alternating movement at every turn;
After one group of controlled high resistance I of circuit in the station moves one-level, if the monitoring busbar voltage is not still in allowing the voltage control band time, 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 this moment controlled high resistance II fault or reached maximum/minimum capacity, then sending out triggering command moves one-level for controlled high resistance I, controlled high resistance I again;
One group of controlled high resistance I of circuit needs action in the station, but because 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 the controlled high resistance II action one-level, if the monitoring busbar voltage is not still in allowing the voltage control band time, then controlled high resistance II need to be moved one-level again.
6. new forms of energy according to claim 1 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: described outer control is inputted outer voltage coboundary U take substation bus bar voltage as input variable
1With outer voltage lower boundary U
2, outer voltage coboundary U
1With outer voltage lower boundary U
2Determined by the user; Outer control Real-Time Monitoring voltage, when new forms of energy are sent the large disturbance of appearances in the system outside, continuous 5s monitors busbar voltage at [U
2, U
1] outside, a level capacity is excised or dropped into to two groups of controlled high resistance I of circuit and controlled high resistance II simultaneously in standing, dynamic adjustments is complete within the monitoring time of 5s for Static Var Compensator and magnet controlled controlled high resistance at this moment, reach its maximum/minimum capacity, after the controlled high resistance action of circuit is complete, begin again the timing that next time circulates;
When the generating region internal fault, i.e. husky state～fish card line fault, then preferential electro-magnetic transient control; If within the monitoring time of 5s, 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 in standing, the then outer control of locking, start the electro-magnetic transient control strategy, circuit controlled high resistance in both sides is thrown to heap(ed) capacity, after electro-magnetic transient control finishes, go back to outer control.
7. new forms of energy according to claim 1 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: described outermost layer voltage control is inputted outermost layer voltage control upper limit U' take substation bus bar voltage as input variable, and the numerical value of U' is determined by the user; Outermost layer voltage control real-time monitoring system voltage is higher than U' in case monitor voltage, and two groups of controlled high resistances of circuit stagewise are moved immediately to heap(ed) capacity in standing, to suppress system high pressure.
8. new forms of energy according to claim 1 are sent the FACTS equipment coordination control method of system outside, it is characterized in that: described outermost layer control priority is higher than outer control, and outer control priority is higher than internal layer control.
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| PCT/CN2013/084261 WO2014048336A1 (en) | 2012-09-27 | 2013-09-26 | Coordination control method for facts devices of new energy delivery system |
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