CN105990843B

CN105990843B - A kind of dc power method of adjustment for following wind power fluctuation to adjust

Info

Publication number: CN105990843B
Application number: CN201510082485.8A
Authority: CN
Inventors: 孙玉娇; 郭剑波; 周勤勇; 郭强; 韩奕; 代倩
Original assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI; State Grid Gansu Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI; State Grid Gansu Electric Power Co Ltd
Priority date: 2015-02-15
Filing date: 2015-02-15
Publication date: 2018-10-09
Anticipated expiration: 2035-02-15
Also published as: CN105990843A

Abstract

The present invention provides a kind of dc power methods of adjustment for following wind power fluctuation to adjust, and the described method comprises the following steps：I, it determines that method obtains dc power prediction curve with dc power curve, and corrects the generation schedule that direct current send receiving end power grid；II, the method for real-time adjustment adjustment dc power for being followed wind power to fluctuate according to dc power.This method can flexibly give dc power definite value, reasonable arrangement dc power curve makes full use of the adjusting resource for sending receiving end power grid and complementary control characteristic, the adjusting for making direct current that receiving end power grid be sent to simultaneously participate in wind power fluctuation, expand wind electricity digestion range, improves wind electricity digestion capability.

Description

A kind of dc power method of adjustment for following wind power fluctuation to adjust

Technical field

The present invention relates to a kind of method of power system automatic field, in particular to one kind follows wind power to fluctuate The dc power method of adjustment of adjusting.

Background technology

People are to the application of electric energy and understanding first since direct current.French physician and the Depews electrician M. The 3 horsepowers of dc generator electricity energy that will be installed in the Bach's coal mine of Meath in 1882 are strangled, it is straight with 1500~2000 volts Galvanic electricity pressure has been sent in Munich international fair other than 57 kilometers, completes transmission of electricity experiment for the first time.Hereafter in 20th century Just, the voltage, power of experimental direct current transportation and distance respectively reached 125 kilovolts, 20 megawatts and 225 kilometers.But due to It is connected using dc generator and obtains high-voltage DC power supply, receiving end motor is also to be run with series system, not only high pressure great Rong It measures the commutation difficulty of direct current generator and is restricted, the mode of series operation is also more complicated, poor reliability, therefore direct current transportation It is not further developed in the period of nearly half a century.In 30~fifties of 20th century, people explore various devices Transverter is constituted as DC high voltage power supply, to substitute dc generator, to have developed controllable mercury transverter, for hair Exhibition high-power direct current transportation opens road.One 96 kilometers long are built up between Sweden native country in 1954 and Goethe's Orchid Island Submarine cable DC transmission line, DC voltage are ± 100 kilovolts, and transimission power is 20 megawatts, is first industrialness in the world High-voltage dc transmission electric wire, since fruit spy's Orchid Island DC transmission engineering is built up, direct current transportation is valued by the people simultaneously again It is rapid to emerge.The appearance of later stage fifties silicon controlled rectifier opens new approach for the manufacture of converter.20th century The seventies, with the development of controllable silicon technology advanced by leaps and bounds, the technical advantage of D.C. high voltage transmission also becomes clear day by day.30 years Come, with the progress of power electronic technique, direct current transportation has new development.The direct current to have put into operation in the world to the eighties Power transmission engineering shares nearly 30, and about 20,000 megawatts of total transmission capacity, longest fed distance is more than 1,000 kilometers.

Since the energy and load are there are the non-uniform problem of distributed pole, primary energy resource is mainly distributed on the density of population It is low, with can small, the underdeveloped southwest of demand, northwest and northern outlying district.Load is concentrated mainly on east central economy hair Up to area.For root it was predicted that this following present situation will continue, extensive transferring electricity from the west to the east and nortel will be presented in China Power flow direction The overview that south is sent.And according to the technical characterstic of direct current transportation, the following direct current transportation will be positioned in Chinese large-scale Energy Base Remote, large capacity send outside, such as southwestern Hydropower Base, northwest and Xinjiang coal electricity, wind power base and transnational electric power can lead to Cross direct current conveying.

Currently, China is completed the DC engineering to put into operation, power arranges generally to press two-period form power curve or constant work( The mode of rate arranges, and when sending end power grid contains large-scale wind power, this mode arranges to need sending end power grid alone bear wind-powered electricity generation The pressure such as peak regulation caused by power swing, frequency modulation, when the installation of direct current sending end power grid wind is larger, often because of direct current sending end Power grid regulating power is limited and causes wind-abandoning phenomenon, causes economic loss, such arrangement of dc power cannot be fully sharp The complementary control characteristic of receiving end power grid and the regulating power of receiving end power grid are sent with direct current, outside the development for not adapting to large-scale wind power It send.

In the prior art, the arrangement of customary DC power is generally according to the mode of firm power or the side of two-period form power curve Formula, such mode are suitble to the more stable normal power supplies of transmission power, when direct current sending end power grid includes fairly large wind-powered electricity generation, Since wind-powered electricity generation is typically distributed across the remote districts far from load center, where regional power grid digestion capability it is limited, generally need Wind-powered electricity generation remote conveying is sent to load center area by direct current, and since sending end power grid is more weak and regulating power has Limit, therefore, when wind-powered electricity generation is larger, often sending end power grid regulating power is insufficient, can cause extensive wind-abandoning phenomenon, cause through Ji loss, is unfavorable for the consumption of wind-powered electricity generation.General load center area power grid is larger, and load center area and wind-powered electricity generation sending end Power grid has certain complementary control characteristic, such as calendar variation, part throttle characteristics difference and power supply architecture difference, existing normal The power arrangement that rule direct current uses is unfavorable for the complementary control characteristic for making full use of direct current to send receiving end power grid, is unfavorable for improving The digestion capability of wind-powered electricity generation, in the case of the following wind-powered electricity generation extensive development, customary DC power arrangement in the prior art The requirement of power network development is not adapted to.

Therefore, the present invention provides a kind of dc power method of adjustment for following wind power fluctuation to adjust, this method can Flexibly given dc power definite value, connects electric system generation schedule, rationally in conjunction with the wind power prediction value of different time scales The dc power of given different time scales removes the heart, constantly refines dc power curve, and pass through the spirit of dc power curve Reasonable arrangement living makes full use of the adjusting resource for sending receiving end power grid and complementary control characteristic, so that direct current is sent receiving end power grid while joining With the adjusting of wind power fluctuation, expand wind electricity digestion range, improves wind electricity digestion capability.

Invention content

To overcome above-mentioned the deficiencies in the prior art, the present invention to provide a kind of dc power for following wind power fluctuation to adjust Method of adjustment.

Solution is used by realizing above-mentioned purpose：

A kind of dc power method of adjustment for following wind power fluctuation to adjust, the described method comprises the following steps：

I, it determines that method obtains dc power prediction curve with dc power curve, and corrects direct current and send receiving end power grid Generation schedule；

II, the method for real-time adjustment adjustment dc power for being followed wind power to fluctuate according to dc power.

Preferably, the dc power curve determines that method includes following：

Step 1：Judge whether wind power plant has wind power long-term forecast as a result, if the history number for being fitted wind power plant without if According to, or while being planned according to wind power plant wind-powered electricity generation annual electricity generating capacity used predicted, wind power plant wind power long-term forecast knot is obtained Fruit；

Step 2：Judge whether wind power plant has wind power medium-term forecast as a result, if the history number for being fitted wind power plant without if According to, or while being planned according to wind power plant wind-powered electricity generation annual electricity generating capacity used predicted, wind power plant wind power medium-term forecast knot is obtained Fruit；

Step 3：Send receiving end power grid long-term generation schedule according to the wind power long-term forecast result and direct current, using wind Dc power arrangement method determines dc power long-term forecast curve in electric base delivery system；

Step 4：According to the dc power long-term forecast curve, corrects direct current and send receiving end power grid mid-term generation schedule；

Step 5：Receiving end power grid mid-term power generation meter is sent according to the wind power medium-term forecast result and revised direct current It draws, dc power medium-term forecast curve is determined using dc power arrangement method in the wind power base delivery system；

Step 6：According to the dc power medium-term forecast curve, corrects direct current and send receiving end power grid Short Term Generation Schedules；

Step 7：Receiving end power grid Short Term Generation Schedules are sent according to short-term wind power prediction result and revised direct current, are adopted Dc power short-term forecast curve is determined with dc power arrangement method in the wind power base delivery system；

Step 8：According to dc power short-term forecast curve, corrects direct current and send receiving end power grid ultra-short term generation schedule；

Step 9：Receiving end power grid ultra-short term power generation meter is sent according to ultrashort-term wind power prediction result and revised direct current It draws, dc power ultra-short term prediction curve is determined using dc power arrangement method in the wind power base delivery system；

Step 10：According to dc power ultra-short term prediction curve, corrects direct current and send receiving end power grid ultra-short term generation schedule, give Go out direct current and send receiving end grid generation unit output base value.

Preferably, dc power arrangement method is in the wind power base delivery system：Consider wind power fluctuation, direct current Sending end power grid regulating power and adjustment cost, direct current receiving end power grid regulating power and adjustment cost, direct current receiving end power grid are to direct current The demand and direct current to transmit electric power utilizes hourage, in conjunction with the long-term forecast of wind power, medium-term forecast, short-term forecast, ultrashort Phase prediction as a result, in conjunction with the long-term generation schedule of power grid, mid-term generation schedule, Short Term Generation Schedules, ultra-short term generation schedule, give Go out the method for the dc power arrangement of different time scales.

Preferably, the dc power follow wind power fluctuate method of real-time adjustment be：Consider direct current sending end power grid With receiving end power grid regulating power, dc power conveying capacity, dc power tap switch regulating power and different adjustable strategies, Turn spare unit and direct current sending end by the urgent positive rotation unit of the wind-powered electricity generation of direct current sending end power grid and receiving end power grid and urgent negative rotation What the adjust automatically of the AGC units and dc power of power grid and receiving end power grid fluctuated to adjust the wind power of direct current sending end power grid Method.

Compared with prior art, scheme provided by the invention has following excellent effect：

In method provided by the invention, determines method using a kind of dc power curve of wind power base delivery system, give Go out to consider Multiple Time Scales, comprehensive multifactor dc power curve arrangement, by gradually refining, flexible reasonable arrangement direct current work( Rate curve effectively expands the adjustable range of wind power fluctuation, improves wind electricity digestion capability.On this basis, it proposes a kind of straight Stream power follows the method for real-time adjustment that wind power fluctuates, and send receiving end power grid wind urgent spinning reserve unit tune using direct current The fluctuation for electrical power of rectifying the incorrect style of work, the routine fluctuations that receiving end power grid AGC units adjust dc power in real time are sent using direct current, with This, is by the real-time adjusting of dc power, the real-time adjusting for making direct current that receiving end power grid be sent to simultaneously participate in wind power fluctuation, reply The substantially real-time random fluctuation of wind power prediction error and wind power.

In institute's extracting method of the present invention, dc power follow wind power fluctuate method of real-time adjustment consider direct current send by The factors such as power grid regulating power, the limitation of direct current transmission power, direct current tap switch-mode regulation ability, different Adjustment principles are held, are given The real-time set-up procedure of dc power gone out is pratical and feasible and reasonable.In the situation that different time scales dc power curve determines Under, the real-time adjustment that wind power fluctuates is followed by dc power, wind power prediction error and wind power is effectively treated Substantially random fluctuation, improve the security and stability of Operation of Electric Systems.

Dc power curve determines method in wind power base delivery system provided by the invention, can be in practical power systems It is applied in management and running department.By the flexible arrangement of dc power curve, it can effectively expand the tune of wind power fluctuation Adjusting range improves wind electricity digestion capability.The determination of dc power curve is considered direct current and is limited using hourage, is straight in the present invention Stream receiving end power grid regulating power and adjustment cost limitation, the limitation of direct current rated power, the limitation of direct current receiving end grid power demand Etc. factors, it is ensured that given dc power curve is pratical and feasible and reasonable.The determination side of dc power curve in the present invention Method considers multiple time scales, can gradually be refined to dc power curve, and by the dc power of different time scales Curve is for correcting electric system generation schedule.

Method provided by the invention can be applied in practical power systems management and running department, can effectively expand wind The adjustable range of electrical power fluctuation, improves wind electricity digestion capability, improves the security and stability of Operation of Electric Systems, institute's extracting method is also It can be applied in other fitful power direct current delivery systems such as photovoltaic.

Description of the drawings

Fig. 1 is that dc power curve determines method flow diagram in wind power base delivery system in the present invention；

Fig. 2 is dc power arrangement method flow chart in wind power base delivery system in the present invention；

Fig. 3 is wind power direct current delivery system in the present embodiment；

Fig. 4 be in the present embodiment the typical day wind power curve of cyclical fluctuations, the direct current that provide send receiving end power grid to wind-powered electricity generation to Lower regulating power, direct current receiving end power grid are to the power Transmission demand curve of direct current；

Fig. 5 is that long-term dc power arranges curve graph in the present embodiment；

Fig. 6 is that mid-term dc power arranges curve graph in the present embodiment；

Fig. 7 is that ultra-short term dc power arranges curve graph in the present embodiment；

Fig. 8 is the method for real-time adjustment flow chart that dc power follows that wind power fluctuates in the present invention；

It is excellent by direct current sending end power grid in the method for real-time adjustment that Fig. 9 follows wind power to fluctuate for dc power in the present invention First adjust Developing Tactics flow chart；

Figure 10 is preferentially to adjust the dc power that strategy obtains by direct current sending end power grid in the present embodiment to adjust result in real time Curve graph；

Figure 11 is to send the receiving end mains frequency deviation dc power that real-time adjustable strategies obtain real by direct current in the present embodiment When adjust result curve figure；

Figure 12 is to send the receiving end dc power that power grid AGC unit regulating power adjustable strategies obtain by direct current in the present embodiment Adjustment result curve figure in real time；

Figure 13 is preferentially to adjust strategy by direct current sending end power grid in the present embodiment and consider direct current tap switch-mode regulation ability When obtained dc power adjust result curve figure in real time；

Figure 14 is to send the real-time adjustable strategies of receiving end mains frequency deviation by direct current in the present embodiment and consider that direct current tap is opened It closes the dc power obtained when regulating power and adjusts result curve figure in real time；

Figure 15 is to send receiving end power grid AGC unit regulating power adjustable strategies by direct current in the present embodiment and consider direct current tap The dc power obtained when switch-mode regulation ability adjusts result curve figure in real time.

Specific implementation mode

The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings.

The present invention provides a kind of dc power method of adjustment for following wind power fluctuation to adjust, and this method includes following step Suddenly：

I, with dc power curve determine method obtain dc power prediction curve, and correct direct current sending end power grid and by Hold the generation schedule of power grid；

II, the method for real-time adjustment for being followed wind power to fluctuate according to dc power, adjust dc power in real time.

In step I, the dc power prediction curve of acquisition includes that dc power long-term forecast curve, dc power mid-term are pre- Survey curve, dc power short-term forecast curve and dc power ultra-short term prediction curve.

Wherein, it can refer to for a long time in 1 year；Mid-term can refer in January；It can refer in 72 hours in short term, with 1 hour for interval；It is super It can refer in 4 hours in short term, using 15min as interval.And each specific duration, interval it can need to provide according to real application systems, It should not be as fixed numbers.

Method flow diagram is determined as shown in FIG. 1, FIG. 1 is dc power curve of the present invention, in step I, dc power curve The method of determination includes following：

Step 1: obtaining relevant parameter；

Step 2: judging whether wind power plant has wind power long-term forecast as a result, if the history for being fitted wind power plant without if Data, or while being planned according to wind power plant wind-powered electricity generation annual electricity generating capacity used are predicted, wind power plant wind power long-term forecast is obtained As a result；

Step 3: judging whether wind power plant has wind power medium-term forecast as a result, if the history for being fitted wind power plant without if Data, or while being planned according to wind power plant wind-powered electricity generation annual electricity generating capacity used are predicted, wind power plant wind power medium-term forecast is obtained As a result；

Step 4: sending receiving end power grid long-term generation schedule according to the wind power long-term forecast result and direct current, use Dc power arrangement method determines dc power long-term forecast curve in wind power base delivery system；

Step 5: according to the dc power long-term forecast curve, corrects direct current and send receiving end power grid mid-term generation schedule；

Step 6: sending receiving end power grid mid-term power generation meter according to the wind power medium-term forecast result and revised direct current It draws, dc power medium-term forecast curve is determined using dc power arrangement method in the wind power base delivery system；

Step 7: according to the dc power medium-term forecast curve, corrects direct current and send receiving end power grid Short Term Generation Schedules；

Step 8: receiving end power grid Short Term Generation Schedules are sent according to short-term wind power prediction result and revised direct current, Dc power short-term forecast curve is determined using dc power arrangement method in the wind power base delivery system；

Step 9: according to dc power short-term forecast curve, corrects direct current and send receiving end power grid ultra-short term generation schedule；

Step 10: sending receiving end power grid ultra-short term power generation meter according to ultrashort-term wind power prediction result and revised direct current It draws, dc power ultra-short term prediction curve is determined using dc power arrangement method in the wind power base delivery system；

Step 11：According to dc power ultra-short term prediction curve, corrects direct current and send receiving end power grid ultra-short term generation schedule, It provides direct current and send receiving end grid generation unit output base value.The direct current send receiving end power grid to refer to direct current sending end power grid and direct current receiving end Power grid.

In above-mentioned steps one, the relevant parameter of acquisition includes：

1, wind power plant planning data specifically include wind-powered electricity generation annual electricity generating capacity etc..

2, wind power plant wind power historical statistical data.Newly-built wind power plant is without the data content.

3, wind power long-term forecast is as a result, such as 1 year generated energy predicted value of wind power plant.

4, wind power medium-term forecast is to predict unit with day as a result, such as wind power plant one week or the prediction result of some months.

5, short-term wind power prediction is prediction with hour as a result, as wind power plant shifts to an earlier date the prediction result of 1-48h or 72h Unit.

6, ultrashort-term wind power prediction result, if wind power plant shifts to an earlier date the prediction result of a few houres or dozens of minutes, with 15 Minute is prediction unit.

7, direct current send receiving end power grid long-term generation schedule, including the long-term generation schedule of direct current sending end power grid and direct current receiving end electricity Net long-term generation schedule.

8, direct current send receiving end power grid mid-term generation schedule, including direct current sending end power grid mid-term generation schedule and direct current receiving end electricity Net mid-term generation schedule.

9, direct current send receiving end power grid Short Term Generation Schedules, including direct current sending end power grid Short Term Generation Schedules and direct current receiving end electricity Net Short Term Generation Schedules.

10, direct current send receiving end power grid ultra-short term generation schedule, including direct current sending end power grid ultra-short term generation schedule and direct current Receiving end power grid ultra-short term generation schedule.

In above-mentioned parameter, if wind power plant wind power historical statistical data is not present, wind power plant planning data are referred to For reference frame；If wind power long-term forecast result and wind power medium-term forecast result parameter are not present, can be according to wind Electric field planning is predicted with data.

As shown in Fig. 2, Fig. 2 be wind power base delivery system dc power arrangement method flow chart, Step 4: six, eight, Dc power arrangement method is in wind power base delivery system described in ten：Consider wind power fluctuation, direct current sending end power grid tune Energy saving power and adjustment cost, direct current receiving end power grid regulating power and adjustment cost, direct current receiving end power grid transmit electric power to direct current Demand and direct current utilize hourage, the knot predicted in conjunction with the long-term forecast of wind power, medium-term forecast, short-term forecast, ultra-short term Fruit provides different time in conjunction with the long-term generation schedule of power grid, mid-term generation schedule, Short Term Generation Schedules, ultra-short term generation schedule The method of the dc power arrangement of scale.

Include the following steps：

Step 1: relevant parameter is obtained, including：(1) direct current rated power P_DN；

(2) direct current minimum delivery power P_{D_min}；

(3) direct current Cumulative Elapsed Time T_DA；

(4) direct current accumulation conveying electricity Q_DA；

(5) direct current utilizes hourage T_DE；

(6) wind power curve (T_w, P_w)；

(7) demand curve (T of the direct current receiving end power grid to direct current transmission power within the scope of wind power plot against time_w, P_{r_need})；

(8) downward regulating power curve (T of the direct current sending end power grid to wind-powered electricity generation within the scope of wind power plot against time_w, P_{s_w_down_limit})；

(9) downward regulating power curve (T of the direct current receiving end power grid to wind-powered electricity generation within the scope of wind power plot against time_w, P_{r_w_down_limit})；

(10) adjustment cost C of the direct current sending end power grid to wind-powered electricity generation within the scope of wind power plot against time_{s_w_down}；

(11) adjustment cost C of the direct current receiving end power grid to wind-powered electricity generation within the scope of wind power plot against time_{r_w_down}；

(12) direct current sending end power grid normal power supplies are delivered up power capability curve within the scope of wind power plot against time (T_w, P_{sc_up_limit})。

Step 2: utilizing hourage according to direct current, determine the direct current by the power being converted to using hourage as the following formula P_DE：

In formula, P_DNFor direct current rated power, T_DEHourage is utilized for direct current.

Direct current refers to the ratio for conveying electricity and direct current rated power in direct current year using hourage.It should be noted that if straight Stream operation has and then has this constraint using the requirement of hourage, otherwise can remove the constraint, i.e., setting be less than using hourage or Equal to 0.

Step 3: comparing wind power P_wDemand P with direct current receiving end power grid to direct current transmission power_{r_need}If P_w＜ P_{r_need}, then directly determine that the dc power is that sending end power grid normal power supplies are delivered up the sum of ability and wind power, receiving end The minimum value of downward four variables of regulating power of grid power demand, direct current rated power, receiving end power grid, and it is not less than direct current Minimum delivery power；

If P_w≥P_{r_need}, then judge the allocation strategy that wind power is adjusted, determine the dc power.

Step 4: determining the updated value P ' of direct current cumulative mean transmission power as the following formula_{DA_average}：

In formula, Q_DAConveying electricity, T are accumulated for direct current_wFor wind power time, P_DtFor the dc power of time t, Δ T is Time difference, T_DAFor direct current Cumulative Elapsed Time.

Step 5: the updated value P '_{DA_average}With direct current by the power P being converted to using hourage_DE；

If P '_{DA_average}＜ P_DE, then six are entered step；

If P_DE＜ P '_{DA_average}, then seven are entered step.

Step 6: first, determining that the dc power is that direct current sending end power grid normal power supplies are delivered up ability and wind-powered electricity generation The sum of power, direct current by the downward regulating power three of power, direct current receiving end power grid being converted to using hourage minimum value, and It is not less than direct current minimum delivery power；Then, direct current cumulative mean transmission power is updated again, determines that the direct current accumulation is flat The updated value P ' of equal transmission power_{DA_average}.Dc power is determined as the following formula：

P_D=max (P_{D_min},min((P_{sc_up_limit}+P_w),P_DE,P_{r_w_down_limit}))

In formula, P_{D_min}For direct current minimum delivery power, P_{sc_up_limit}It is delivered up ability, P for sending end power grid normal power supplies_w For wind power, P_DEIt is direct current by the power being converted to using hourage, P_{r_w_down_limit}It is direct current receiving end power grid to wind-powered electricity generation Downward regulating power；

Then direct current cumulative mean transmission power is updated again.Direct current cumulative mean transmission power is updated as the following formula：

In formula, Q_DAConveying electricity, T are accumulated for direct current_wFor wind power time, P_DtFor the dc power of time t, i.e. time The P of point t_D=max (P_{D_min},min((P_{sc_up_limit}+P_w),P_DE,P_{r_w_down_limit})), Δ T is time difference, T_DAIt is accumulated for direct current Run time.

Step 7: the dc power P determined after the completion of comparison step four, five, six_DWith direct current sending end power grid to wind-powered electricity generation Downward regulating power P_{s_w_down_limit}The sum of with wind power P_w。

If P_w＜ P_D+P_{s_w_down_limit}, then eight are entered step, otherwise determines as the following formula and enters step 8 after abandoning air quantity；

P_{w_abandoned}=P_w-(P_D+P_{s_w_down_limit})

In formula, P_DFor dc power, P_wFor wind power, P_{s_w_down_limit}For direct current sending end power grid to wind-powered electricity generation to downward Energy saving power.

Step 8: determining that direct current sending end power grid and receiving end power grid are respectively necessary for the pondage provided for wind-powered electricity generation；Including：

Determine that the direct current sending end power grid needs the pondage provided for wind-powered electricity generation to be as the following formula：

P_{s_w_down}=-min (max (P_w-P_D,0),P_{s_w_down_limit})

Determine that the receiving end power grid needs the pondage provided for wind-powered electricity generation to be as the following formula：

P_{r_w_down}=-P_D

Step 9: judging whether to complete dc power arrangement, if not completing, it is updated to subsequent time, otherwise returns to step Rapid two.

Step 3 is further illustrated, determines dc power as the following formula：

P_D=max (P_{D_min},min((P_{sc_up_limit}+P_w),P_{r_need},P_DN,P_{r_w_down_limit}))

In formula, P_{D_min}For direct current minimum delivery power, P_{sc_up_limit}It is delivered up ability, P for sending end power grid normal power supplies_w For wind power, P_{r_need}Demand for direct current receiving end power grid to direct current transmission power, P_DNFor direct current rated power, P_{r_w_down_limit}It is direct current receiving end power grid to the downward regulating power of wind-powered electricity generation.

In step 3, the allocation strategy that the wind power is adjusted includes：By wind-powered electricity generation preferentially by direct current conveying, by direct current It send the proportional distribution of receiving end power grid regulating power and send receiving end power grid adjustment cost proportional distribution by direct current.

1, preferentially pass through direct current conveyance strategy by wind-powered electricity generation according to described, it is determined that dc power is wind power, direct current The minimum value of the downward regulating power three of rated power, direct current receiving end power grid, and simultaneously be not less than direct current minimum delivery power or Direct current sending end power grid normal power supplies are delivered up the sum of ability and wind power.

The dc power is determined as the following formula：

P_D=max (min (P_{D_min},P_{sc_up_limit}+P_w),min(P_w,P_DN,P_{r_w_down_limit})))

In formula, P_{D_min}For direct current minimum delivery power, P_{sc_up_limit}It is delivered up ability, P for sending end power grid normal power supplies_w For wind power, P_DNFor direct current rated power, P_{r_w_down_limit}It is direct current receiving end power grid to the downward regulating power of wind-powered electricity generation；

2, send receiving end power grid regulating power proportional allocation strategy by direct current according to described, it is determined that dc power is wind Electrical power adjusts downwards energy by sending the value of the proportional distribution of receiving end power grid regulating power, direct current rated power, direct current receiving end power grid The minimum value of power three, and it is delivered up ability and wind not less than direct current minimum delivery power or direct current sending end power grid normal power supplies The sum of electrical power.

The dc power is determined as the following formula：

In formula, P_{D_min}For direct current minimum delivery power, P_{sc_up_limit}It is delivered up ability, P for sending end power grid normal power supplies_w For wind power, P_{s_w_down_limit}It is direct current sending end power grid to the downward regulating power of wind-powered electricity generation, P_{r_w_down_limit}For direct current receiving end Power grid is to the downward regulating power of wind-powered electricity generation, P_DNFor direct current rated power.

3, send receiving end power grid adjustment cost proportional allocation strategy by direct current according to described, it is determined that dc power is wind Electrical power adjusts downwards energy by sending the value of the proportional distribution of receiving end power grid adjustment cost, direct current rated power, direct current receiving end power grid The minimum value of power three, and it is delivered up ability and wind not less than direct current minimum delivery power or direct current sending end power grid normal power supplies The sum of electrical power.

The dc power is determined as the following formula：

In formula, P_{D_min}For direct current minimum delivery power, P_{sc_up_limit}It is delivered up ability, P for sending end power grid normal power supplies_w For wind power, C_{s_w_down}It is direct current sending end power grid to the adjustment cost of wind-powered electricity generation, C_{r_w_down}It is direct current receiving end power grid to wind-powered electricity generation Adjustment cost, P_{r_w_down_limit}It is direct current receiving end power grid to the downward regulating power of wind-powered electricity generation, P_DNFor direct current rated power.

A specific embodiment is provided, explanation preferentially send receiving end using by wind-powered electricity generation by direct current conveyance strategy, by direct current respectively The proportional allocation strategy of power grid regulating power in the case of sending the proportional allocation strategy of receiving end power grid adjustment cost by direct current, is adopted The process of dc power is determined with the method for the present invention.

First, relevant parameter is obtained, including：(1) direct current rated power P_DN=8000MW.

(2) direct current minimum delivery power P_{D_min}=800MW.

(3) direct current Cumulative Elapsed Time T_DA=0.

(4) direct current accumulation conveying electricity Q_DA=0.

(5) direct current utilizes hourage T_DE=5500 hours.

(6) wind power curve (T_w, P_w), as shown in Fig. 3, table 1.

(7) demand of the direct current receiving end power grid to direct current transmission power within the scope of wind power plot against time, such as Fig. 4,1 institute of table Show.

(8) direct current sending end power grid is to the downward regulating power of wind-powered electricity generation within the scope of wind power plot against time, such as Fig. 4,1 institute of table Show.

(9) direct current receiving end power grid is to the downward regulating power of wind-powered electricity generation within the scope of wind power plot against time, such as Fig. 4,1 institute of table Show.

(10) adjustment cost C of the direct current sending end power grid to wind-powered electricity generation within the scope of wind power plot against time_{s_w_down}=0.3 yuan/ kw.h。

(11) adjustment cost C of the direct current receiving end power grid to wind-powered electricity generation within the scope of wind power plot against time_{r_w_down}=0.4 yuan/ kw.h。

(12) direct current sending end power grid normal power supplies are delivered up power capability within the scope of wind power plot against time, as Fig. 3, Shown in table 1.

Step 2：Direct current is calculated by the power being converted to using hourage

Step 3：Moment 0, wind power P_w2667MW, stream receiving end power grid is to direct current transmission power P_{r_need}1600MW, than Compared with P_wAnd P_{r_need}, P_w>P_{r_need}。

Then, respectively to using preferentially sent by direct current conveyance strategy, by direct current by wind-powered electricity generation receiving end power grid regulating power at Pro rate is sent receiving end power grid adjustment cost three kinds of strategy scenarios of proportional distribution to illustrate by direct current.

Situation one, by wind-powered electricity generation preferentially by direct current conveyance strategy, method using the present invention, lower continuous steps are as follows：

Step 4：Investigation allocation strategy is wind-powered electricity generation preferentially by direct current conveyance strategy, calculating dc power

P_D=max (min (P_{D_min},P_{sc_up_limit}+P_w),min(P_w,P_DN,P_{r_w_down_limit}))

=max (min (800,8000+2667), min (2667,8000,8000)) MW=2667MW

Step 5：Calculate the updated value of direct current cumulative mean transmission power：

Step 6：Judge that direct current cumulative mean transmission power updated value is less than direct current by the work(being converted to using hourage Rate.Then calculate dc power：

P_D=max (P_{D_min},min((P_{sc_up_limit}+P_w),P_DE,P_{r_w_down_limit}))

=max (800, min ((8000+2667), 5022,8000)) MW=5022MW

Again, direct current cumulative mean transmission power is updated again

Step 7：Judge P_D+P_{s_w_down_limit}=(5022+6000) MW ＞ P_w=2667MW, without abandoning wind.

Step 8：Obtaining direct current send receiving end power grid to need the pondage provided for wind-powered electricity generation to be respectively

P_{s_w_down}=-min (max (P_w-P_D,0),P_{s_w_down_limit})

=-min (max (2667-5022,0), 6000) MW=0MW

P_{r_w_down}=-P_D=-5022MW

Step 9：Judge whether to complete dc power arrangement, unfinished then be updated to subsequent time, repeatedly step 2 arrives Nine；Until completing dc power arrangement.

Situation two is sent receiving end power grid regulating power proportional allocation strategy by direct current, method using the present invention, lower continuous step It is rapid as follows：

Step 4：It is to send receiving end power grid regulating power proportional allocation strategy by direct current to investigate allocation strategy, calculates direct current Power

Step 6：Judge that direct current cumulative mean transmission power updated value is less than direct current by the work(being converted to using hourage Rate.Calculate dc power：

P_D=max (P_{D_min},min((P_{sc_up_limit}+P_w),P_DE,P_{r_w_down_limit}))

=max (800, min ((8000+1524), 5022,8000)) MW

=5022MW

Again, direct current cumulative mean transmission power is updated again

Step 7：Judge, P_D+P_{s_w_down_limit}=(5022+6000) MW ＞ P_w=2667MW, without abandoning wind.

P_{s_w_down}=-min (max (P_w-P_D,0),P_{s_w_down_limit})

=-min (max (2667-5022,0), 6000) MW=0MW

P_{r_w_down}=-P_D=-5022MW

Situation three is sent receiving end power grid adjustment cost proportional allocation strategy by direct current, method using the present invention, lower continuous step It is rapid as follows：

Step 4：It is to send receiving end power grid adjustment cost proportional allocation strategy by direct current to investigate allocation strategy, calculates direct current Power：

Step 6：Judge：Direct current cumulative mean transmission power updated value is less than direct current by the work(being converted to using hourage Rate.Calculate dc power

P_D=max (P_{D_min},min((P_{sc_up_limit}+P_w),P_DE,P_{r_w_down_limit}))

=max (800, min ((8000+1706.88), 5022,8000)) MW

=5022MW

Again, direct current cumulative mean transmission power is updated again

P_{s_w_down}=-min (max (P_w-P_D,0),P_{s_w_down_limit})

=-min (max (2667-5022,0), 6000) MW=0MW

P_{r_w_down}=-P_D=-5022MW

Table 1 is that typical day wind power fluctuates, direct current send downward regulating power, direct current receiving end electricity of the receiving end power grid to wind-powered electricity generation Power Transmission demand data table of the net to direct current.

In this implementation, refer in 1 year for a long time；Mid-term referred in January；Refer in 72 hours in short term, with 1 hour for interval；It is ultrashort Phase refers in 225min, using 15min as interval.

As shown in the following table 2,3,4,5, table 2 is wind power long-term forecast result provided by the embodiment and corresponding direct current Send receiving end power grid to the downward regulating power of wind-powered electricity generation, direct current receiving end power grid to the power Transmission demand of direct current.Table 3 is that this implementation carries The wind power medium-term forecast result of confession and corresponding direct current send downward regulating power of the receiving end power grid to wind-powered electricity generation, direct current receiving end Power Transmission demand of the power grid to direct current.Table 4 is short-term wind power prediction result provided by the embodiment and corresponding direct current Send receiving end power grid to the downward regulating power of wind-powered electricity generation, direct current receiving end power grid to the power Transmission demand of direct current.Table 5 is that this implementation carries The ultrashort-term wind power prediction result of confession and corresponding direct current send receiving end power grid to the downward regulating power of wind-powered electricity generation, direct current by Hold power Transmission demand of the power grid to direct current.With the method for the present invention, according to corresponding data, long-term, mid-term, short is carried out Phase, ultra-short term dc power curve arrangement.

As shown in Fig. 5,6,7, long-term, mid-term and ultra-short term dc power curve arrangement figure respectively in the present embodiment.

Table 2 is that wind power long-term forecast result and corresponding direct current send downward adjusting energy of the receiving end power grid to wind-powered electricity generation Power, direct current receiving end power grid are to the power Transmission demand of direct current.

Wind power (MW)	Receiving end demand (MW)	Receiving end regulating power (MW)	Sending end regulating power (MW)	Sending end normal power supplies conveying capacity (MW)
					10463.33	4466.667	5733.333	3900	6400

Table 3 is that wind power medium-term forecast result and corresponding direct current send downward adjusting energy of the receiving end power grid to wind-powered electricity generation Power, direct current receiving end power grid are to the power Transmission demand of direct current.

Month	Wind power (MW)	Receiving end demand (MW)	Receiving end regulating power (MW)	Sending end regulating power (MW)	Sending end normal power supplies conveying capacity (MW)
						1	9632	6400	7200	4200	8000
2	9494.4	5600	7200	4200	8000
						3	11833.6	4800	6400	3600	8000
4	12934.4	4000	5600	3600	8000
						5	11214.4	3200	4800	3600	7200
6	9632	2400	4800	4200	7200
						7	10870.4	2400	5600	4800	6400
8	11696	3200	6400	5400	4800
						9	10320	4000	4800	3600	4800
10	8393.6	5600	4800	3600	4800
						11	9081.6	5600	5600	3000	4800
12	10457.6	6400	5600	3000	4800

Fig. 4 is that short-term wind power prediction result and corresponding direct current send downward adjusting energy of the receiving end power grid to wind-powered electricity generation Power, direct current receiving end power grid are to the power Transmission demand of direct current.

Moment (h)	Wind power (MW)	Receiving end demand (MW)	Receiving end regulating power (MW)	Sending end regulating power (MW)	Sending end normal power supplies conveying capacity (MW)
						0	4800	1600	8000	4200	5600
1	7600	1600	8000	6000	8000
						2	6533.333	1600	8000	6000	8000
3	6880	2400	8000	6000	8000
						4	6733.333	3200	7200	5400	7200
5	7616	4000	7200	5400	7200
						6	5600	4800	6400	4800	6400
7	5866.667	4800	6400	3600	4800
						8	4693.333	4800	6400	3600	4800

9	3658.667	5600	5600	3600	4800
						10	2640	5600	5600	3600	4800
11	1536	6400	4800	3600	4800
						12	653.3333	7200	4000	4200	5600
13	538.6667	8000	3200	4200	5600
						14	693.3333	8000	3200	4200	5600
15	700	7200	4000	3600	4800
						16	576	7200	4000	3000	4000
17	733.3333	8000	4000	2400	3200
						18	1386.667	8000	3200	2400	3200
19	7709.333	8000	3200	2400	3200
						20	9333.333	8000	3200	2400	3200
21	6060	8000	3200	2400	3200
						22	6600	7200	4800	3000	4000
23	5749.333	2400	6400	3000	4000
						0	5066.667	1600	8000	4200	5600
1	8960	1600	8000	6000	8000
						2	5666.667	1600	8000	6000	8000
3	7040	2400	8000	6000	8000
						4	6933.333	3200	7200	5400	7200
5	7466.667	4000	7200	5400	7200
						6	7333.333	4800	6400	4800	6400
7	5104	4800	6400	3600	4800
						8	5573.333	4800	6400	3600	4800
9	3696	5600	5600	3600	4800
						10	2424	5600	5600	3600	4800
11	1254.4	6400	4800	3600	4800
						12	500	7200	4000	4200	5600
13	533.3333	8000	3200	4200	5600
						14	522.6667	8000	3200	4200	5600

15	606.6667	7200	4000	3600	4800
						16	544	7200	4000	3000	4000
17	726.6667	8000	4000	2400	3200
						18	1306.667	8000	3200	2400	3200
19	7630.667	8000	3200	2400	3200
						20	10360	8000	3200	2400	3200
21	5400	8000	3200	2400	3200
						22	7466.667	7200	4800	3000	4000
23	7626.667	2400	6400	3000	4000
						0	5866.667	1600	8000	4200	5600
1	7760	1600	8000	6000	8000
						2	6400	1600	8000	6000	8000
3	6960	2400	8000	6000	8000
						4	6333.333	3200	7200	5400	7200
5	7765.333	4000	7200	5400	7200
						6	7333.333	4800	6400	4800	6400
7	6336	4800	6400	3600	4800
						8	5749.333	4800	6400	3600	4800
9	3397.333	5600	5600	3600	4800
						10	2040	5600	5600	3600	4800
11	1126.4	6400	4800	3600	4800
						12	626.6667	7200	4000	4200	5600
13	437.3333	8000	3200	4200	5600
						14	501.3333	8000	3200	4200	5600
15	580	7200	4000	3600	4800
						16	453.3333	7200	4000	3000	4000
17	533.3333	8000	4000	2400	3200
						18	933.3333	8000	3200	2400	3200
19	8260	8000	3200	2400	3200
						20	6906.667	8000	3200	2400	3200

21	5940	8000	3200	2400	3200
						22	6666.667	7200	4800	3000	4000
23	5632	2400	6400	3000	4000

Fig. 5 is that ultrashort-term wind power prediction result and corresponding direct current send downward adjusting energy of the receiving end power grid to wind-powered electricity generation Power, direct current receiving end power grid are to the power Transmission demand of direct current.

Moment (min)	Wind power (MW)	Receiving end demand (MW)	Receiving end regulating power (MW)	Sending end regulating power (MW)	Sending end normal power supplies conveying capacity (MW)
						0	4800	1600	8000	4200	5600
15	5440	1600	8000	4200	5600
						30	4853.33	1600	8000	4200	5600
45	5333.33	1600	8000	4200	5600
						60	8400	1600	8000	6000	8000
75	8320	1600	8000	6000	8000
						90	7840	1600	8000	6000	8000
105	8720	1600	8000	6000	8000
						120	6200	1600	8000	6000	8000
135	7066.67	1600	8000	6000	8000
						150	6133.33	1600	8000	6000	8000
165	6133.33	1600	8000	6000	8000
						180	8720	2400	8000	6000	8000
195	7200	2400	8000	6000	8000
						210	8560	2400	8000	6000	8000
225	8000	2400	8000	6000	8000

In method provided by the invention, the dc power in step II follows the method for real-time adjustment that wind power fluctuates For：Consider that direct current sending end power grid and receiving end power grid regulating power, dc power conveying capacity, dc power tap switch adjust energy Power and different adjustable strategies are turned by the urgent positive rotation unit of the wind-powered electricity generation of direct current sending end power grid and receiving end power grid and urgent negative rotation The adjust automatically of the AGC units and dc power of spare unit and direct current sending end power grid and receiving end power grid adjusts direct current sending end The method of the wind power fluctuation of power grid.It is as follows.

First, following relevant parameter is obtained：

(1) the dc power value P of dc power curve arrangement_D.If (without dc power curve arrangement, 0) which is

(2) wind power real-time measurement values P_w。

(3) it is included in the wind power value P of generation schedule_{w_plan}.If (wind power is not included in generation schedule, 0) which is

(4) direct current minimum delivery power P_{D_min}.(value can be manually set as needed, it is not limited in DC techniques Minimum delivery power)

(5) direct current sending end power grid AGC units positive regulator ability P_{s_AGC_up}。

(6) direct current sending end power grid AGC unit down regulation capacities P_{s_AGC_down}。

(7) direct current receiving end power grid AGC units positive regulator ability P_{r_AGC_up}。

(8) direct current receiving end power grid AGC unit down regulation capacities P_{r_AGC_down}。

(9) the spare startup threshold values P of wind power positive rotation_{w_emergency_T_up}＞ 0.

(10) wind power bears spinning reserve startup threshold values P_{w_emergency_T_down}＞ 0.

(11) the spare unit pondage P of the urgent positive rotation of direct current sending end power grid wind_{s_w_emergency_reserve_up}。

(12) the spare unit pondage P of the urgent positive rotation of direct current receiving end power grid wind_{r_w_emergency_reserve_up}。

(13) the urgent negative rotation of direct current sending end power grid wind turns spare unit pondage P_{s_w_emergency_reserve_down}。

(14) the urgent negative rotation of direct current receiving end power grid wind turns spare unit pondage P_{r_w_emergency_reserve_down}。

(15) direct current sending end power grid combination frequency response characteristic factor beta_s。

(16) direct current receiving end power grid combination frequency response characteristic factor beta_r。

(17) direct current sending end mains frequency measured value f_s。

(18) direct current receiving end mains frequency measured value f_r。

(19) direct current tap switch is adjusted up ability P_{D_λlimit_up}。

(20) direct current tap switchs downward regulating power P_{D_λlimit_down}。

(21) dc power adjustable strategies, it may include：Strategy is preferentially adjusted by direct current sending end power grid, send receiving end electric by direct current The real-time adjustable strategies of net frequency departure are sent receiving end power grid AGC unit regulating powers adjustable strategies by direct current, consider tap switch most Big regulating power adjustable strategies.

After obtaining parameter, the real-time adjustment that dc power follows wind power to fluctuate is realized according to following methods, such as Fig. 8 institutes Show, Fig. 8 is the method for real-time adjustment flow chart that dc power follows that wind power fluctuates in the present invention, specifically includes following step Suddenly：

Step 1: determining that the spare startup threshold values of wind power positive rotation and wind power bear spinning reserve startup threshold values；

Step 2: calculating wind power real-time measurement values and being included in the wind power value deviation delta of generation schedule P_{w_real_plan}, and determine that the initial value of the wind power value deviation after the adjustment is to calculate the wind power value deviation obtained；

Step 3: judge whether the initial value of the wind power value deviation after the adjustment is out-of-limit, and it is not out-of-limit, it enters step Four, it is out-of-limit, the urgent spinning reserve unit of wind-powered electricity generation is adjusted, and update the wind power value deviation after the adjustment；

Step 4: the wind power value deviation delta P ' after the adjustment_{w_real_plan}Spinning reserve is born with wind power Startup threshold values P_{w_emergency_T_down}：

If Δ P '_{w_real_plan}＞ P_{w_emergency_T_down}, it is determined that abandon air quantity P_{w_abandoned}, and after updating the adjustment Wind power value deviation delta P '_{w_real_plan}；Otherwise V is entered step；

Step 5: investigating dc power adjustable strategies, correlation method is used under the different dc power adjustable strategies Dc power is adjusted in real time.

In step 1, under different dc power adjustable strategies, the spare startup threshold values of wind power positive rotation are determined Spinning reserve startup threshold values are born with wind power；

According to preferentially adjusting strategy by direct current sending end power grid, send receiving end mains frequency deviation real-time adjustable strategies by direct current Or receiving end power grid AGC unit regulating power adjustable strategies are sent by direct current, it determines that the wind power positive rotation is spare as the following formula and opens Dynamic threshold values and the wind power bear spinning reserve startup threshold values：

P_{w_emergency_T_up}=P_{s_AGC_up}+min(max(P_D-P_{D_min},0),P_{r_AGC_up})

P_{w_emergency_T_down}=P_{s_AGC_down}+min(max((P_DN-P_D),0),P_{r_AGC_down})

According to tap switch maximal regulated capacity adjusting strategy is considered, then wind power positive rotation is determined respectively as the following formula Spare startup threshold values and wind power bear spinning reserve startup threshold values：

P_{w_emergency_T_up}=P_{s_AGC_up}+min(max(P_D-P_{D_min},0),P_{r_AGC_up},P_{D_λlimit_down})

P_{w_emergency_T_down}=P_{s_AGC_down}+min(max((P_DN-P_D),0),P_{r_AGC_down},P_{D_λlimit_up})

In above formula, P_{s_AGC_up}For direct current sending end power grid AGC unit positive regulator abilities, P_{r_AGC_up}For direct current receiving end power grid AGC Unit positive regulator ability, P_{s_AGC_down}For direct current sending end power grid AGC unit down regulation capacities, P_{r_AGC_down}For direct current receiving end power grid AGC unit down regulation capacities, P_DFor the dc power value of dc power curve arrangement, P_DNFor direct current rated power, P_{D_λlimit_up} It is adjusted up ability, P for direct current tap switch_{D_λlimit_down}Downward regulating power, P are switched for direct current tap_{D_min}Most for direct current Small transmission power, P_{D_min}=0.1*P_DN, P_DNFor direct current rated power.

Step 2 includes：It determines the wind power real-time measurement values as the following formula and is included in the wind power value of generation schedule Deviation：ΔP_{w_real_plan}=P_w-P_{w_plan}

In formula, P_wFor wind power real-time measurement values, P_{w_plan}To be included in the wind power value of generation schedule.

The purpose of step II is the real-time adjustment by dc power, so that direct current is sent receiving end power grid while coping with wind-powered electricity generation work( Influence of the rate deviation to power grid.Reply wind power deviation first has to consider whether the deviation in direct current send receiving end power grid AGC machines In the adjustable range of group, if deviation is larger, the adjustable range of receiving end power grid AGC units is sent beyond direct current, then must start up wind Electric urgent spinning reserve unit, handles the skew component beyond AGC unit regulating powers, to avoid power grid accident. After being handled wind power deviation by wind-powered electricity generation emergency use unit, remaining wind power deviation should be able to direct current send by It holds within the scope of power grid AGC unit regulating powers (otherwise, power grid can not be born, and may cause power grid accident etc.).Wind-powered electricity generation is urgent Size of the enabling of spinning reserve unit depending on wind power deviation, if initial wind power deviation is without departing from direct current The AGC unit regulating powers for sending receiving end power grid need not then enable the urgent spinning reserve unit of wind-powered electricity generation, it is only necessary to which direct current send receiving end power grid AGC units are directly adjusted.If initial wind power deviation send the AGC units of receiving end power grid to adjust beyond direct current Ability, then after must enabling the urgent spinning reserve unit of wind-powered electricity generation, could later use direct current send the AGC units of receiving end power grid into Row is adjusted.

It is objective fact due to calculating the determining wind power value deviation, and the wind power value after the adjustment is inclined Poor then wind power value deviation after being coped with for virtual power grid, can change with the counter-measure of power grid.Therefore, it counts It during calculation, will not be modified to calculating the determining wind power value deviation, can only be arranged according to the possible reply of power grid It applies and the wind power value deviation after the virtual adjustment is updated and is adjusted.Therefore, at the beginning of calculating, i.e. step 2 In, the initial value for giving the wind power value deviation after the adjustment first is to calculate the determining wind power value deviation, i.e.,： The initial value Δ P ' of wind power value deviation after given adjustment_{w_real_plan}=Δ P_{w_real_plan}。

And in subsequent step, then the counter-measure that can be done according to power grid is inclined to the wind power value after the adjustment Difference is updated and adjusts.

Step 3, for judge wind power real-time measurement values and be included in generation schedule wind power value deviation whether mistake Greatly, the startup urgent spinning reserve unit of wind-powered electricity generation is needed to be adjusted if excessive.Step 3 is realized through specified direct current sending end electricity Promptly positive and negative spinning reserve unit copes with being widely varied for wind power for net, receiving end power grid wind.

It is specific as follows；

The step 3 includes：Compare the spare startup threshold values P of the wind power positive rotation_{w_emergency_T_up}, the wind Electrical power bears spinning reserve startup threshold values P_{w_emergency_T_down}With the initial value Δ P of the wind power value deviation_{w_real_plan}：

If 1. ,-P_{w_emergency_T_up}＜ Δs P_{w_real_plan}＜ P_{w_emergency_T_down}, then four are entered step；

If 2., Δ P_{w_real_plan}＞ P_{w_emergency_T_down}, then determine that the urgent negative rotation of direct current sending end power grid wind turns as the following formula Spare unit pondage：

ΔP_{s_w_emergency_reserve_down}=-min (Δ P_{w_real_plan}-P_{w_emergency_T_down}, P_{s_w_emergency_reserve_down})

The wind power value deviation after direct current sending end power grid adjustment is determined as the following formula：：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_emergency_reserve_down}

Determine that the urgent negative rotation of direct current receiving end power grid wind turns spare unit pondage as the following formula：

ΔP_{r_w_emergency_reserve_down}=-min (Δ P '_{w_real_plan}-P_{w_emergency_T_down},

max(P_DN-P_D,0),P_{r_w_emergency_reserve_down})

The wind power value deviation after direct current receiving end power grid adjustment is determined as the following formula：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{r_w_emergency_reserve_down}

Direct current adjustment amount Δ P is determined as the following formula_D：

ΔP_D=-Δ P_{r_w_emergency_reserve_down}

Adjust dc power value P_{D_new}=P_D+ΔP_D；

If 3., Δ P_{w_real_plan}＜-P_{w_emergency_T_up}, then the urgent positive rotation of direct current sending end power grid wind is determined as the following formula Spare unit pondage：

ΔP_{s_w_emergency_reserve_up}=min (- Δ P_{w_real_plan}-P_{w_emergency_T_up},P_{s_w_emergency_reserve_up})

The wind power value deviation after direct current sending end power grid adjustment is determined as the following formula：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_emergency_reserve_up}

The spare unit pondage of the urgent positive rotation of direct current receiving end power grid wind is determined as the following formula：

ΔP_{r_w_emergency_reserve_up}=min (- Δ P '_{w_real_plan}-P_{w_emergency_T_up},

max(P_D-P_{D_min},0),P_{r_w_emergency_reserve_up})

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{r_w_emergency_reserve_up}

ΔP_D=-Δ P_{r_w_emergency_reserve_up}

Adjust dc power value P_{D_new}=P_D+ΔP_D；

In formula, Δ P_{w_real_plan}For wind power real-time measurement values and it is included in the wind power value deviation of generation schedule, P_{w_emergency_T_up}For the spare startup threshold values of wind power positive rotation, P_{D_min}For direct current minimum delivery power, P_DFor dc power The dc power value of curve arrangement, P_DNFor direct current rated power.

Step 4 includes：Air quantity P is abandoned described in determining as the following formula_{w_abandoned},

P_{w_abandoned}=Δ P '_{w_real_plan}-P_{w_emergency_T_down}

The wind power real-time measurement values are adjusted as the following formula and are included in the wind power value deviation of generation schedule, are determined and are adjusted The wind power value deviation delta P ' after whole_{w_real_plan}, the wind power value deviation send receiving end power grid AGC units in direct current Regulating power range, i.e.-P_{w_emergency_T_up}＜ Δs P '_{w_real_plan}＜ P_{w_emergency_T_down}；

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}-P_{w_abandoned}

In formula, P_{w_emergency_T_down}Spinning reserve startup threshold values are born for wind power.

In step 5, realize through direct current sending end power grid, the AGC units of receiving end power grid and the adjust automatically of dc power To automatically adjust the wind power fluctuation of direct current sending end power grid.

In step 5, the dc power adjustable strategies include preferentially adjusting strategy by direct current sending end power grid, being sent by direct current The real-time adjustable strategies of receiving end mains frequency deviation are sent receiving end power grid AGC unit regulating power adjustable strategies by direct current and consider to divide Connect switch maximal regulated capacity adjusting strategy.

(1), when using strategy is preferentially adjusted by direct current sending end power grid, dc power is adjusted in real time and is included the following steps：

1., judge the wind power real-time measurement values after adjustment and be included in the wind power value deviation delta of generation schedule P′_{w_real_plan}Whether 0 is more than：

If Δ P '_{w_real_plan}＞ 0, it is determined that direct current sending end power grid AGC unit negative regulator amount Δs P_{s_w_AGC_down}For：

ΔP_{s_w_AGC_down}=-min (max (P_w-P_{D_min},0),ΔP′_{w_real_plan},P_{s_w_AGC_down})

Updating the wind power value deviation is：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_AGC_down}

Determine direct current receiving end power grid AGC unit negative regulator amount Δs P_{r_w_AGC_down}For：

ΔP_{r_w_AGC_down}=-min (Δ P '_{w_real_plan},max(P_DN-P_{D_new},0),P_{r_w_AGC_down})

Determine that direct current adjustment amount is：ΔP_D=-Δ P_{r_w_AGC_down}；

Newer dc power is：P_{D_new}=P_{D_new}+ΔP_D

If Δ P '_{w_real_plan}＜ 0, it is determined that direct current sending end power grid AGC unit positive regulator amount Δs P_{s_w_AGC_up}For：

ΔP_{s_w_AGC_up}=min (- Δ P '_{w_real_plan},P_{s_w_AGC_up})

Updating the wind power value deviation is：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_AGC_up}

Determine direct current receiving end power grid AGC unit positive regulator amount Δs P_{r_w_AGC_up}For：

ΔP_{r_w_AGC_up}=min (- Δ P '_{w_real_plan},max(P_{D_new}-P_{D_min},0),P_{r_w_AGC_up})

Determine that direct current adjustment amount is：ΔP_D=-Δ P_{r_w_AGC_up}；

Newer dc power is：P_{D_new}=P_{D_new}+ΔP_D；

In formula, P_wWind power real-time measurement values, P_{D_min}Direct current minimum delivery power, Δ P_DFor direct current adjustment amount.

(2), when using it is described send receiving end mains frequency deviation real-time adjustable strategies by direct current when, adjust direct current work(in real time Rate includes the following steps：

The frequency of monitoring sending end power grid and receiving end power grid in real time, determines direct current adjustment amount：

Dc power is adjusted according to the frequency departure of the sending end power grid and receiving end power grid：

P_{D_new}=P_{D_new}+ΔP_D

In formula, P_{D_min}For direct current minimum delivery power, P_{D_new}For updated dc power, P_DNFor direct current rated power, β_sFor direct current sending end power grid combination frequency response characteristic coefficient, β_rFor direct current receiving end power grid combination frequency response characteristic coefficient, f_sFor Direct current sending end mains frequency measured value, f_rFor direct current receiving end mains frequency measured value.

(3), when sending receiving end power grid AGC unit regulating power adjustable strategies by direct current described in, direct current is adjusted in real time Power includes the following steps：

Determine that direct current adjustment amount is：

Dc power is adjusted as the following formula：

P_{D_new}=P_{D_new}+ΔP_D

In formula, P_{D_min}For direct current minimum delivery power, P_{D_new}For updated dc power, P_DNFor direct current rated power, ΔP_{r_AGC}For direct current receiving end power grid AGC unit regulating power differences, Δ P_{s_AGC}For direct current sending end power grid AGC unit regulating powers Difference, Δ P '_{w_real_plan}For after adjustment wind power real-time measurement values and be included in the wind power value deviation of generation schedule；

ΔP_{r_AGC}For direct current receiving end power grid AGC unit regulating powers, as Δ P '_{w_real_plan}When ＞ 0, Δ P_{r_AGC}= P_{r_w_AGC_down}；As Δ P '_{w_real_plan}When ＜ 0, Δ P_{r_AGC}=P_{r_w_AGC_up}；

ΔP_{s_AGC}For direct current sending end power grid AGC unit regulating powers, as Δ P '_{w_real_plan}When ＞ 0, Δ P_{s_AGC}= P_{s_w_AGC_down}；As Δ P '_{w_real_plan}When ＜ 0, Δ P_{s_AGC}=P_{s_w_AGC_up}。

(4), consider that tap switch maximal regulated capacity adjusting strategy includes：Increase direct current tap switch and is adjusted up energy What power and downward regulating power limited preferentially adjusts strategy by direct current sending end power grid, send receiving end mains frequency deviation real-time by direct current Adjustable strategies and send receiving end power grid AGC unit regulating power adjustable strategies by direct current.

1., when using it is described increase direct current tap switch be adjusted up ability and downward regulating power limitation given by direct current When end power grid preferentially adjusts strategy, dc power is adjusted in real time and is included the following steps：

If judging Δ P '_{w_real_plan}＞ 0, it is determined that direct current sending end power grid AGC unit negative regulator amount Δs P_{s_w_AGC_down}For：

Updating the wind power value deviation is：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_AGC_down}

ΔP_{r_w_AGC_down}=-min (Δ P '_{w_real_plan},max(P_DN-P_{D_new},0),P_{r_w_AGC_down},P_{D_λlimit_up})

Determine that direct current adjustment amount is：

ΔP_D=-Δ P_{r_w_AGC_down}

Adjusting dc power value is：P_{D_new}=P_{D_new}+ΔP_D

If judging Δ P '_{w_real_plan}＜ 0, it is determined that direct current sending end power grid AGC unit positive regulator amount Δs P_{s_w_AGC_up}For：

ΔP_{s_w_AGC_up}=min (- Δ P '_{w_real_plan},P_{s_w_AGC_up})

Updating the wind power value deviation is：

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_AGC_up}

ΔP_{r_w_AGC_up}=min (- Δ P '_{w_real_plan},max(P_{D_new}-P_{D_min},0),P_{r_w_AGC_up},P_{D_λlimit_down})

Direct current adjustment amount is：

ΔP_D=-Δ P_{r_w_AGC_up}

Adjusting dc power value is：P_{D_new}=P_{D_new}+ΔP_D

2., when using it is described increase direct current tap switch be adjusted up ability and downward regulating power limitation given by direct current When the real-time adjustable strategies of receiving end mains frequency deviation, dc power is adjusted in real time and is included the following steps：

P_{D_new}=P_{D_new}+ΔP_D

In formula, P_{D_λlimit_up}It is adjusted up ability, P for direct current tap switch_{D_λlimit_down}It is downward for direct current tap switch Regulating power, in formula, P_{D_min}For direct current minimum delivery power, P_{D_new}For updated dc power, P_DNFor the specified work(of direct current Rate, β_sFor direct current sending end power grid combination frequency response characteristic coefficient, β_rFor direct current receiving end power grid combination frequency response characteristic coefficient, f_sFor direct current sending end mains frequency measured value, f_rFor direct current receiving end mains frequency measured value；

3., when using it is described increase direct current tap switch be adjusted up ability and downward regulating power limitation given by direct current When receiving end power grid AGC unit regulating power adjustable strategies, dc power is adjusted in real time and is included the following steps：

Determine that direct current adjustment amount is：

Dc power is adjusted as the following formula：

P_{D_new}=P_{D_new}+ΔP_D

In formula, P_{D_λlimit_up}It is adjusted up ability, P for direct current tap switch_{D_λlimit_down}It is downward for direct current tap switch Regulating power, P_{D_min}For direct current minimum delivery power, P_{D_new}For updated dc power, P_DNFor direct current rated power, Δ P_{s_AGC}For direct current sending end power grid AGC unit regulating power differences, Δ P '_{w_real_plan}It is measured in real time for the wind power after adjustment It is worth and is included in the wind power value deviation of generation schedule；

ΔP_{r_AGC}For direct current receiving end power grid AGC unit regulating powers, as Δ P '_{w_real_plan}When ＞ 0, Δ P_{r_AGC}= P_{r_w_AGC_down}；ΔP′_{w_real_plan}When ＜ 0, Δ P_{r_AGC}=P_{r_w_AGC_up}；

ΔP_{s_AGC}For direct current sending end power grid AGC unit regulating powers, as Δ P '_{w_real_plan}When ＞ 0, Δ P_{s_AGC}= P_{s_w_AGC_down}；ΔP′_{w_real_plan}When ＜ 0, Δ P_{s_AGC}=P_{s_w_AGC_up}。

The embodiment for the method for real-time adjustment that one follows wind power to fluctuate with the dc power of the present invention is provided, first It needs to obtain relevant parameter, including：

Wind power real-time amount measured value P_w, the corresponding wind power consumption value P of ultra-short term dc power curve_{w_plan}, direct current The positive and negative regulating power P of sending end power grid AGC units_{s_AGC_up}、P_{s_AGC_down}, the positive and negative regulating power of direct current receiving end power grid AGC units P_{r_AGC_up}、P_{r_AGC_down}, direct current send the urgent positive rotation of receiving end power grid wind spare unit pondage P_{s_w_emergency_reserve_up}、P_{r_w_emergency_reserve_up}, direct current send the urgent negative rotation of receiving end power grid wind to turn spare unit and adjusts Capacity P_{s_w_emergency_reserve_down}、P_{r_w_emergency_reserve_down}, direct current send receiving end power grid combination frequency response characteristic coefficient β_s、β_r, direct current send receiving end mains frequency measured value f_s、f_rEqual data informations are shown in Table 6.

Table 6 is wind power real-time amount measured value, is included in the wind power of generation schedule and is adjusted in real time for dc power Other whole tables of data.

With the method for the present invention, following steps are specifically included：

Moment 0

The corresponding dc power of dc power curve is P_D=0MW.The wind power for being included in generation schedule is P_{w_plan}= 0MW。

Step 1：

Given direct current minimum delivery power is the 10% of direct current rated power, i.e. P_{D_min}=0.1*P_DN=800MW.

The spare startup threshold values of given wind power positive rotation：

P_{w_emergency_T_up}=P_{s_AGC_up}+min(max(P_D-P_{D_min},0),P_{r_AGC_up})

=4000MW+min (max (0-800,0), 5000) MW

=4000MW

Given wind power bears spinning reserve startup threshold values：

P_{w_emergency_T_down}=P_{s_AGC_down}+min(max((P_DN-P_D),0),P_{r_AGC_down})

=4000MW+min (max (8000-0), 0), 5000) MW

=9000MW

If dc power adjustable strategies are to consider tap switch maximal regulated capacity adjusting strategy, wind power is being given just Spinning reserve startup threshold values are：

=4000MW+min (max (0-800,0), 5000,1200) MW

=4000MW

Given wind power bears spinning reserve startup threshold values：

=4000MW+min (max (8000-0), 0), 5000,2160) MW

=6160MW

Step 2：

It calculates wind power real-time measurement values and is included in the wind power deviation delta P of generation schedule_{w_real_plan}=P_w- P_{w_plan}=4953.6MW-0MW=4953.6MW.

It gives the wind power real-time measurement values after adjustment and is included in the wind power value deviation initial value Δ of generation schedule P′_{w_real_plan}=Δ P_{w_real_plan}=4953.6MW.

Step 3：The urgent spinning reserve unit adjustment of wind-powered electricity generation.

Judgement-P_{w_emergency_T_up}＜ Δs P_{w_real_plan}＜ P_{w_emergency_T_down}, receiving end power grid wind is sent without starting direct current Electric urgent spinning reserve unit.ΔP_D=0MW, Δ P '_{w_real_plan}=4953.6MW, P_{D_new}=P_D+ΔP_D=0MW, is walked Rapid 4.

Step 4：Judge Δ P '_{w_real_plan}＜ P_{w_emergency_T_down}, without abandoning wind.

After the completion of step 4, the wind power real-time measurement values after being adjusted are corresponding with ultra-short term dc power curve The deviation delta P ' of wind electricity digestion capability_{w_real_plan}=4953.6MW, and Δ P '_{w_real_plan}Receiving end power grid AGC units are sent in direct current Regulating power within the scope of, that is, meet following condition：

-P_{w_emergency_T_up}＜ Δs P '_{w_real_plan}＜ P_{w_emergency_T_down}

Step 5：Dc power is adjusted in real time.

Following several sides can be selected respectively using different dc power adjustable strategies by investigating dc power adjustable strategies Method is realized.

Method 1：Strategy is preferentially adjusted by direct current sending end power grid

Judge Δ P '_{w_real_plan}＞ 0, then direct current sending end power grid regulated quantity be：

ΔP_{s_w_AGC_down}=-min (max (P_w-P_{D_min},0),ΔP_w′_{_real_plan},P_{s_w_AGC_down})

=-min (max (4816-800,0), min (4953.6,4000)) MW=-4000MW

ΔP′_{w_real_plan}=Δ P '_{w_real_plan}+ΔP_{s_w_AGC_down}=4953.6MW-4000MW=953.6MW

Direct current receiving end regulated quantity is：

ΔP_{r_w_AGC_down}=-min (Δ P '_{w_real_Dforecast},max(P_DN-P_D,0),P_{r_w_AGC_down})

=-min (953.6, max (8000-5023,0), 5000)=- 953.6MW

Direct current adjustment amount is：

ΔP_D=-Δ P_{r_w_AGC_down}=953.6MW

Method 2：Send receiving end mains frequency deviation real-time adjustable strategies by direct current

Direct current monitoring in real time is sent, the frequency of receiving end power grid is adjusted according to sending the frequency departure of receiving end power grid to adjust dc power Whole amount is

Method 3：Receiving end power grid AGC unit regulating power adjustable strategies are sent by direct current

Direct current is by the strategy adjustment dc power for sending receiving end power grid AGC pondage proportional allocations, adjustment amount

Method 4：Consider tap switch maximal regulated capacity adjusting strategy

Calculating when by different adjustable strategies and considering tap switch adjustment capability is close with above-mentioned computational methods 1,2,3, Concrete outcome is shown in attached drawing 13,14,15.

Finally it should be noted that:Above example is merely to illustrate the technical solution of the application rather than to its protection domain Limitation, although the application is described in detail with reference to above-described embodiment, institute those skilled in the art read the application Afterwards still can to the specific implementation mode of application carry out it is various change, modification either equivalent replacement but these change, modification or Equivalent replacement is being applied within pending claims.

Claims

1. a kind of dc power method of adjustment for following wind power fluctuation to adjust, it is characterised in that：The method includes following Step：

I, it determines that method obtains dc power prediction curve with dc power curve, and corrects the power generation that direct current send receiving end power grid Plan；

II, the method for real-time adjustment adjustment dc power for being followed wind power to fluctuate according to dc power；

The dc power curve determines that method includes following：

Step 1：Judge whether wind power plant has wind power long-term forecast as a result, if being fitted the historical data of wind power plant without if, Or wind-powered electricity generation annual electricity generating capacity used is predicted when being planned according to wind power plant, obtains wind power plant wind power long-term forecast result；

Step 2：Judge whether wind power plant has wind power medium-term forecast as a result, if being fitted the historical data of wind power plant without if, Or wind-powered electricity generation annual electricity generating capacity used is predicted when being planned according to wind power plant, obtains wind power plant wind power medium-term forecast result；

Step 3：Send receiving end power grid long-term generation schedule according to the wind power long-term forecast result and direct current, using wind-powered electricity generation base Dc power arrangement method determines dc power long-term forecast curve in ground delivery system；

Step 5：Receiving end power grid mid-term generation schedule is sent according to the wind power medium-term forecast result and revised direct current, is adopted Dc power medium-term forecast curve is determined with dc power arrangement method in the wind power base delivery system；

Step 7：Receiving end power grid Short Term Generation Schedules are sent according to short-term wind power prediction result and revised direct current, using institute It states dc power arrangement method in wind power base delivery system and determines dc power short-term forecast curve；

Step 9：Receiving end power grid ultra-short term generation schedule is sent according to ultrashort-term wind power prediction result and revised direct current, is adopted Dc power ultra-short term prediction curve is determined with dc power arrangement method in the wind power base delivery system；

Step 10：It according to dc power ultra-short term prediction curve, corrects direct current and send receiving end power grid ultra-short term generation schedule, provide straight Stream receiving end grid generation unit output base value.

2. the method as described in claim 1, it is characterised in that：Dc power arrangement method in the wind power base delivery system For：Consider wind power fluctuation, direct current sending end power grid regulating power and adjustment cost, direct current receiving end power grid regulating power and adjusting The demand and direct current that cost, direct current receiving end power grid transmit electric power to direct current utilize hourage, in conjunction with wind power long-term forecast, Medium-term forecast, short-term forecast, ultra-short term prediction as a result, in conjunction with the long-term generation schedule of power grid, mid-term generation schedule, short-term electricity generation Plan, ultra-short term generation schedule, the method for providing the dc power arrangement of different time scales.

3. the method as described in claim 1, it is characterised in that：The dc power follows the real-time adjustment that wind power fluctuates Method is：Consider direct current sending end power grid and receiving end power grid regulating power, dc power conveying capacity, dc power tap switch tune Energy saving power and different adjustable strategies, it is by the urgent positive rotation unit of the wind-powered electricity generation of direct current sending end power grid and receiving end power grid and promptly negative The adjust automatically of the AGC units and dc power of spinning reserve unit and direct current sending end power grid and receiving end power grid adjusts direct current The method of the wind power fluctuation of sending end power grid.