CN107732951A

CN107732951A - Direct current locking failure impacts the multiple resource control method for coordinating and device of communication channel

Info

Publication number: CN107732951A
Application number: CN201710902265.4A
Authority: CN
Inventors: 陈得治; 袁森; 罗亚洲; 马世英; 宋云亭; 贾琳; 王青; 訾鹏; 张晨; 李轶群; 李再华; 李媛媛; 郑超; 吴丽华; 张鑫; 申旭辉; 张志强; 李立新; 袁珩迪
Original assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI; North China Grid Co Ltd; State Grid Shanghai Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI; North China Grid Co Ltd; State Grid Shanghai Electric Power Co Ltd
Priority date: 2017-09-29
Filing date: 2017-09-29
Publication date: 2018-02-23
Anticipated expiration: 2037-09-29
Also published as: CN107732951B

Abstract

The invention provides the multiple resource control method for coordinating and device of a kind of direct current locking failure impact communication channel, first determines the steady state stability limit of communication channel, it is then determined that multiple resource coordinates control sequence and coordinates controlled quentity controlled variable, finally realizes the coordination control of multiple resource.Overall evaluation of a technical project provided by the invention considers that pumped storage cuts pump, dc power is promptly modulated, the control resource of accurate cutting load and cutting load polymorphic type, enrich control device, the object function that multiple resource coordinates Controlling model is minimised as optimization aim with cutting load amount, and consider constraints, improve the validity of control, control cost is reduced, and improves power network defending performance；The coordination control sequence of multiple resource and the coordination controlled quentity controlled variable of multiple resource are obtained using heuritic approach in addition, the coordination controlled quentity controlled variable interpretation of the multiple resource obtained by heuritic approach is strong, there is preferable practicality.

Description

Direct current locking failure impacts the multiple resource control method for coordinating and device of communication channel

Technical field

The present invention relates to extra-high voltage direct-current technical field, and in particular to a kind of direct current locking failure impacts the more of communication channel Resource coordination control method and device.

Background technology

With Large Copacity extra-high voltage direct-current progressively construction and put into operation, China formed more massive regional internet electric power System, but in the transitional period is built, for strong dc, still suffer from situations such as communication channel is relatively weak.Following power network To put into it is a plurality of send outside, feed-in extra-high voltage direct-current, some extra-high-voltage alternating currents contact sections are then relatively weak, it is overall present it is tetanic weak The feature of friendship.If generation direct current locking failure, will cause large-scale power flow transfer, the more stable pole of weak communication channel may be made Limit, power network occur Transient Instability, influence power network safety operation.

The mode for making weak communication channel be hit that puts into operation of more extra-high voltage direct-currents becomes more complicated and changeable；Meanwhile more directly Intensive feed-in is flowed, there is a possibility that more direct currents in succession or locking simultaneously, increase impact degree, control difficulty and control generation Valency further increases.Control research at present on reply direct current locking failure is more, and for power network serious event occurs for document [1] After barrier, the assignment problem of cutting load peace control total amount, a kind of total amount that will cut off is researched to developed and has reasonably distributed to each execution station Efficient algorithm, first, it is determined that the basic principle that algorithm should meet, then propose round algorithm, meeting basic principle On the premise of, by the global method approached, the mistake amount of cutting of safety stabilization control system is greatly reduced, effectively reduces accident In the case of system and user loss.Document [2] is based on using the interacted system comprising multiple direct current transportation passages as research object The characteristics of high-voltage direct current fast modulation power, it is proposed that the security control device action policy after single channel failure, the strategy Consider the constraintss such as the stabilization of power grids, unit output, turning band wasted power by other direct currents ensures that unit adjusts and reduce power minimum. Although above-mentioned document, which copes with strong dc, impacts weak communication channel security and stability control, but still has the following disadvantages：

(1) the single security and stability control means such as the machine of cutting, cutting load, HVDC Modulation are laid particular emphasis on, but more direct currents impact weak friendship Circulation road energy is big, wide to electric network influencing, and the prevention and control of conventional, single resource have the deficient validity and prevention and control cost is excessive etc. Problem；

(2) the security and stability control resource of prevention and control problems combs not comprehensive enough, has counted and the coordination of multiple resource Available control resource is not completely covered in control research；

(3) solve resources control model and largely rely on complex mathematical method, the physics of obtained control solution contains Justice is not good enough, and practicality needs further to be improved；

(4) it there is no meter and more comprehensive and destabilization problems caused by for tackling the weak communication channel of strong dc impact more at present Resource coordination Controlling model.

Document [1] Chen Xinghua, Wu Liexin, Wu Guobing, wait safety stabilization control systems cutting load amount allocation algorithm [J] after Electrical equipment, 2007,35 (11)：26-29.

Document [2] Feng Changyou, Chen Gang, Xu Tao, waits Power system security control device modulates after HVDC transmission system failures Tactful [J] electric power network techniques, 2012,36 (9)：88-94.

The content of the invention

The defects of in order to overcome above-mentioned resource availability deficiency single in the prior art and excessive prevention and control cost, the present invention carries For the static state of the multiple resource control method for coordinating and device of a kind of direct current locking failure impact communication channel, first determination communication channel Stability limit；Then Controlling model is coordinated according to the multiple resource for meeting constraints and determines that multiple resource coordinates control sequence and coordination Controlled quentity controlled variable；Multiple resource, which coordinates Controlling model, to be included with the object function of cutting load amount minimum target structure, constraints according to The steady state stability limit of communication channel determines；Finally coordinate control sequence according to multiple resource and coordinate controlled quentity controlled variable to realize multiple resource Coordinate control.

In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：

The present invention provides a kind of multiple resource control method for coordinating of direct current locking failure impact communication channel, including：

Determine the steady state stability limit of communication channel；

Multiple resource according to constraints is met coordinates Controlling model and determines that multiple resource coordinates control sequence and coordinates to control Amount；The multiple resource, which coordinates Controlling model, to be included with the object function of the minimum target structure of cutting load amount, the constraints Determined according to the steady state stability limit of communication channel；

Control sequence is coordinated according to multiple resource and coordinates controlled quentity controlled variable carrying out multiple resource coordination control.

The steady state stability limit for determining communication channel includes：

If the static active power of communication channel is 0, based on steady-state load flow model and machine-electricity transient model to direct current locking Failure is emulated, and obtains the asynchronous oscillation center of the relative power-angle curve and tetanic weak alternating current net for referring to machine of generator；

Judge whether to meet following two conditions simultaneously：

1) the relative generator rotor angle with reference to machine of generator is more than 360 degree, and the generator with being located at communication channel respectively with reference to machine Both sides；

2) the asynchronous oscillation center of tetanic weak alternating current net falls on weak communication channel；

If so, then communication channel reaches steady state stability limit, dynamic of the record communication channel in steady state stability limit has Work(power peak, and dynamic active power peak value of the communication channel in steady state stability limit is steady as the static state of communication channel Determine the limit；Otherwise the static active power of communication channel is increased into 50MW, return is based on steady-state load flow model and electromechanical transient mould Type emulates to direct current locking failure, and performs subsequent operation.

The object function such as following formula：

F=min P_fh (1)

Wherein, F represents object function, P_fhRepresent cutting load amount.

The constraints includes inequality constraints of the weak communication channel in steady state stability limit, element in the steady limit of heat Interior inequality constraints, busbar voltage cut the bound constraint of pump amount, direct current work(in the inequality constraints of bound scope, pumped storage The bound constraint of the urgent modulation voltage of rate, the bound constraint of accurate cutting load amount and the bound constraint of cutting load amount.

Inequality constraints such as following formula of the weak communication channel in steady state stability limit：

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim (2)

Wherein, S₀For the dynamic active power peak value of communication channel after direct current locking failure, S_limFor the static state of communication channel Stability limit, Δ S (P_cx,P_d,P_jz,P_fh) be communication channel dynamic active power peak value knots modification, P_cxPump amount is cut for pumped storage, P_dFor the urgent modulation voltage of dc power, P_jzFor accurate cutting load amount, P_fhFor cutting load amount, cx represents that pumped storage cuts pump resource, and d is represented The urgent modulation resources of dc power, jz represent accurate cutting load resource, and fh represents cutting load resource；

Inequality constraints such as following formula of the element in the hot steady limit：

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max (3)

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max (4)

Wherein, P_s,0To save the initial active power of element in discontinuity surface near region, P_s,maxTo save element in discontinuity surface near region The steady limit of heat, Δ P_s(P_cx,P_d,P_jz,P_fh) it is the active power knots modification for saving element in discontinuity surface near region；P_c,0To control place The initial active power of element, P near region_c,maxFor the hot steady limit of element in control place near region, Δ P_c(P_cx,P_d,P_jz, P_fh) it is the active power knots modification for controlling element in the near region of place；

Inequality constraints such as following formula of the busbar voltage in bound scope：

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max (5)

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max (6)

Wherein, U_s,minAnd U_s,maxRespectively save the lower and upper limit of discontinuity surface near region median generatrix voltage, U_s,0It is interrupted to save The initial voltage of face near region median generatrix, Δ U_s(P_cx,P_d,P_jz,P_fh) it is the knots modification for saving discontinuity surface near region median generatrix voltage； U_c,minAnd U_c,maxRespectively control the lower and upper limit of place near region median generatrix voltage, U_c,0For control place near region median generatrix Initial voltage, Δ U_c(P_cx,P_d,P_jz,P_fh) it is control place near region median generatrix voltage knots modification；

The pumped storage cuts the bound constraint such as following formula of pump amount：

0≤P_cx≤P_cx,max (7)

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

The bound constraint such as following formula of the urgent modulation voltage of dc power：

0≤P_d≤P_d,max (8)

Wherein, P_d,maxThe upper limit promptly modulated for dc power, when dc power, which is promptly modulated to speed, increases modulation, P_d,maxThe upper limit increased for the urgent speed of dc power, value 10%P_d,e；When dc power is promptly modulated to prompt drop modulation, P_d,maxThe upper limit promptly modulated for dc power, value 90%P_d,e, P_d,eFor the active power of DC transmission system conveying；

The bound constraint such as following formula of the precisely cutting load amount：

0≤P_jz≤P_jz,max (9)

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

The bound constraint such as following formula of the cutting load amount：

0≤P_fh≤P_fh,max (10)

Wherein, P_fh,maxFor the upper limit of cutting load.

It is described to determine that multiple resource coordinates control sequence and coordination according to the multiple resource coordination Controlling model for meeting constraints Controlled quentity controlled variable includes：

Object function is solved using heuritic approach, following multiple resource is obtained and coordinates control sequence：

Pumped storage cuts pump, dc power is promptly modulated, the priority of accurate cutting load, cutting load successively from high to low；

Cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains pumped storage and cut according to pumped storage Pump, dc power are promptly modulated, the coordination controlled quentity controlled variable of accurate cutting load and cutting load.

Cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains pumped storage according to pumped storage Cutting the coordination controlled quentity controlled variable of pump includes：

Make P_d、P_jz、P_fhThe initial value that pump amount is cut with pumped storage is 0, and the step-length increase P of pump is cut according to pumped storage_cx, now P_cx=P_cx,0+μ_cx, P_cx,0The initial value of pump amount, μ are cut for pumped storage_cxThe step-length of pump is cut for pumped storage；

Check P_cxWhether formula (7) is met, if being unsatisfactory for formula (7), pumped storage cuts the coordination controlled quentity controlled variable P' of pump_cx=P_cx-μ_cx；It is no Then check P_cxWhether formula (3)-(6) are met simultaneously；

If P_cxAsynchronously meet formula (3)-(6), P'_cx=P_cx-μ_cx；Otherwise P is checked_cxWhether formula (2) is met；

If P_cxMeet formula (2), P'_cx=P_cx, coordination controlled quentity controlled variable P' that dc power is promptly modulated_d, accurate cutting load association Adjust controlled quentity controlled variable P'_jzWith the tune controlled quentity controlled variable P' of cutting load association_fhIt is 0；Otherwise it is P that the pumped storage for making now, which cuts pump amount,_cx,0, and return to root The step-length of pump is cut according to pumped storage increases P_cx, and subsequent operation is performed, until obtaining P'_cx。

Cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains direct current according to pumped storage The coordination controlled quentity controlled variable that power is promptly modulated includes：

Make P_jz、P_fhInitial value with the urgent modulation voltage of dc power is 0, and the step promptly modulated according to dc power Long increase P_d, now P_d=P_d,0+μ_d, P_d,0For the initial value of the urgent modulation voltage of dc power, μ_dPromptly modulated for dc power Step-length；

Check P_dWhether formula (8) is met, if being unsatisfactory for formula (8), P'_d=P_d-μ_d；Otherwise according to P'_cxCheck P_dWhether simultaneously Meet formula (3)-(6)；

If asynchronously meet formula (3)-(6), P'_d=P_d-μ_d；Otherwise according to P'_cxCheck P_dWhether formula (2) is met；

If P_dMeet formula (2), P'_d=P_d, P'_jzAnd P'_fhIt is 0；Otherwise the urgent modulation voltage of dc power now is made to be P_d,0, and return to the step-length increase P promptly modulated according to dc power_d, and subsequent operation is performed, until obtaining P'_d。

Cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains precisely according to pumped storage The coordination controlled quentity controlled variable of cutting load includes：

Make P_fhInitial value with accurate cutting load amount is 0, and increases P according to the step-length of accurate cutting load_jz, now P_jz =P_jz,0+μ_jz, P_jz,0For the initial value of accurate cutting load amount, μ_jzFor the step-length of accurate cutting load；

Check P_jzWhether formula (9) is met, if being unsatisfactory for formula (9), P'_jz=P_jz-μ_jz；Otherwise according to P'_cxAnd P'_dCheck P_jz Whether formula (3)-(6) are met simultaneously；

If P_jzAsynchronously meet formula (3)-(6), P'_jz=P_jz-μ_jz；Otherwise according to P'_cxAnd P'_dCheck P_jzWhether formula is met (2)；

If P_jzMeet formula (2), P'_jz=P_jz, P'_fhFor 0；Otherwise it is P to make accurate cutting load amount now_jz,0, and return to root Increase P according to the step-length of accurate cutting load_jz, and subsequent operation is performed, until obtaining P'_jz。

According to pumped storage cut pump, dc power promptly modulate, the coordination control sequence of accurate cutting load, cutting load obtain cutting it is negative The coordination controlled quentity controlled variable of lotus includes：

The initial value for making cutting load amount is 0, and increases P according to the step-length of cutting load_fh, now P_fh=P_fh,0+μ_fh, P_fh,0 For the initial value of cutting load amount, μ_fhFor the step-length of cutting load；

Check P_fhWhether formula (10) is met, if being unsatisfactory for formula (10), P'_fh=P_fh-μ_fh；Otherwise according to P'_cx、P'_dAnd P'_jz Check P_fhWhether formula (3)-(6) are met simultaneously；

If P_fhAsynchronously meet formula (3)-(6), P'_fh=P_fh-μ_fh；Otherwise according to P'_cx、P'_dAnd P'_jzCheck P_fhIt is whether full Sufficient formula (2)；

If P_fhMeet formula (2), P'_fh=P_fh；Otherwise it is P to make cutting load amount now_fh,0, return to the step according to cutting load Long increase P_fh, and subsequent operation is performed, until obtaining P'_fh。

The present invention also provides a kind of multiple resource cooperative control device of direct current locking failure impact communication channel, including：

First determining module, for determining the steady state stability limit of communication channel；

Second determining module, determine that multiple resource coordinates control for coordinating Controlling model according to the multiple resource for meeting constraints System order and coordination controlled quentity controlled variable；The multiple resource, which coordinates Controlling model, to be included with the target letter of the minimum target structure of cutting load amount Number, the constraints determine according to the steady state stability limit of communication channel；

Coordinating control module, multiple resource coordination control is carried out for coordinating control sequence according to multiple resource and coordinating controlled quentity controlled variable System.

First determining module is specifically used for：

Judge whether to meet following two conditions simultaneously：

Second determining module is specifically used for：

It is defined below the object function of formula：

F=min P_fh (1)

Wherein, F represents object function, P_fhRepresent cutting load amount.

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim (2)

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max (3)

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max (4)

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max (5)

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max (6)

0≤P_cx≤P_cx,max (7)

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

0≤P_d≤P_d,max (8)

0≤P_jz≤P_jz,max (9)

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

The bound constraint such as following formula of the cutting load amount：

0≤P_fh≤P_fh,max (10)

Wherein, P_fh,maxFor the upper limit of cutting load.

Second determining module is specifically used for：

Compared with immediate prior art, technical scheme provided by the invention has the advantages that：

The multiple resource control method for coordinating of direct current locking failure impact communication channel provided by the invention, first determine that exchange is logical The steady state stability limit in road；Then Controlling model is coordinated according to the multiple resource for meeting constraints and determines that multiple resource coordination control is suitable Sequence and coordination controlled quentity controlled variable；Multiple resource, which coordinates Controlling model, to be included with the object function of the minimum target structure of cutting load amount, constraint Condition determines according to the steady state stability limit of communication channel；Finally coordinate control sequence according to multiple resource and coordinate controlled quentity controlled variable to realize The coordination control of multiple resource；

The multiple resource cooperative control device of direct current locking failure impact communication channel provided by the invention includes being used to determine First determining module of the steady state stability limit of communication channel, for according to meet constraints multiple resource coordinate Controlling model Determine that multiple resource coordinates control sequence and the second determining module for coordinating controlled quentity controlled variable and for suitable according to multiple resource coordination control Sequence and controlled quentity controlled variable of coordinating carry out the coordinating control module that multiple resource coordinates control, finally realize the coordination control of multiple resource；

Technical scheme provided by the invention considers more comprehensive, combines that pumped storage cuts pump, dc power is promptly modulated, precisely The control resource of cutting load and cutting load polymorphic type, enrich the security and stability control means of power network；

Technical scheme provided by the invention proposes that the multiple resource of meter and constraints coordinates Controlling model, and multiple resource coordinates control The object function of simulation is minimised as optimization aim with cutting load amount, and considers and solving the impact exchange of direct current locking failure The destabilization problems of passage, while the other safety and stability problems of power network will not be triggered, that is, consider including weak communication channel in static state Inequality constraints in the hot steady limit of inequality constraints, element in stability limit, busbar voltage in bound scope not Equality constraint, pumped storage cut the bound constraint, the bound constraint of the urgent modulation voltage of dc power, accurate cutting load amount of pump amount Bound constrains and the bound of cutting load amount constrains in interior constraints, coordinates more moneys of Controlling model implementation according to multiple resource Source controls, and improves the validity of control, reduces control cost, and improves power network defending performance；

Technical scheme provided by the invention has obtained the coordination control sequence of multiple resource using heuritic approach, and is providing more The coordination controlled quentity controlled variable of multiple resource has been obtained on the basis of the coordination control sequence in source, the multiple resource obtained by heuritic approach It is strong to coordinate controlled quentity controlled variable interpretation, there is preferable practicality.

Brief description of the drawings

Fig. 1 is the multiple resource control method for coordinating flow of direct current locking failure impact communication channel in the embodiment of the present invention 1 Figure；

Fig. 2 be in the embodiment of the present invention 2 Future targets year North China and other regional power grids between extra-high voltage alternating current-direct current it is mutual Join electric network composition schematic diagram；

Fig. 3 is the southern linear heat generation rate curve of cyclical fluctuations figure of length in the embodiment of the present invention 2 under direct current locking failure；

Fig. 4 is that direct current near region and Xi Meng bases wind-powered electricity generation generator terminal are electric under tin Thailand direct current different modulating amount in the embodiment of the present invention 2 Press schematic diagram；

Fig. 5 is tin Thailand direct current different modulating Liang Xia Xi Meng bases and the passage trend of major network interconnection in the embodiment of the present invention 2 Schematic diagram；

Fig. 6 is that multiple resource coordinates the lower Shanxi south direct current near region of control in the embodiment of the present invention 2 and province's discontinuity surface Power flow simulation shows It is intended to；

Fig. 7 is that multiple resource coordinates the lower Shanxi south direct current near region of control in the embodiment of the present invention 2 and province's discontinuity surface node voltage is imitated True schematic diagram；

Fig. 8 is that multiple resource coordinates control with illustrating without the southern linear heat generation rate curve comparison of length under measure in the embodiment of the present invention 2 Figure；

Fig. 9 is that the multiple resource coordination control strategy of the weak communication channel of direct current locking failure impact in the embodiment of the present invention 2 shows It is intended to.

Embodiment

The present invention is described in further detail below in conjunction with the accompanying drawings.

Embodiment 1

The embodiment of the present invention 1 provides a kind of multiple resource control method for coordinating of direct current locking failure impact communication channel, tool The flow of body is as shown in figure 1, specifically include following steps：

S101：Determine the steady state stability limit of communication channel；

S102：Multiple resource according to constraints is met coordinates Controlling model and determines that multiple resource coordinates control sequence and coordination Controlled quentity controlled variable；Multiple resource, which coordinates Controlling model, to be included with the object function of cutting load amount minimum target structure, constraints according to The steady state stability limit for the communication channel that S101 is determined determines；

S103：The multiple resource determined according to S102 coordinates control sequence and coordination controlled quentity controlled variable carries out multiple resource and coordinates control.

In above-mentioned S101, determine that the steady state stability limit detailed process of communication channel is as follows：

1st, the static active power of communication channel is set as 0, is established based on the electric system simulation such as PSD-BPA analysis software steady State tide model and machine-electricity transient model, and direct current locking failure is emulated, obtain the relative generator rotor angle for referring to machine of generator The asynchronous oscillation center of curve and tetanic weak alternating current net；

2nd, judge whether to meet following two conditions simultaneously：

Object function such as following formula in above-mentioned S102：

F=min P_fh (1)

Wherein, F represents object function, P_fhRepresent cutting load amount.

Above-mentioned constraints includes inequality constraints of the weak communication channel in steady state stability limit, element (including line Road and transformer) inequality constraints in the hot steady limit, busbar voltage cut pump in the inequality constraints of bound scope, pumped storage The bound constraint of amount, the bound constraint of the urgent modulation voltage of dc power, the bound of accurate cutting load amount are constrained and cut negative The bound constraint of lotus amount, introduces above-mentioned constraints separately below：

(1) inequality constraints of the weak communication channel in steady state stability limit such as following formula：

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim (2)

(2) inequality constraints such as following formula of the element in the hot steady limit：

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max (3)

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max (4)

(3) inequality constraints such as following formula of the busbar voltage in bound scope：

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max (5)

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max (6)

(4) pumped storage cuts the bound constraint such as following formula of pump amount：

0≤P_cx≤P_cx,max (7)

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

(5) the bound constraint such as following formula of the urgent modulation voltage of dc power：

0≤P_d≤P_d,max (8)

(6) the precisely bound constraint such as following formula of cutting load amount：

0≤P_jz≤P_jz,max (9)

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

(7) the bound constraint such as following formula of cutting load amount：

0≤P_fh≤P_fh,max (10)

Wherein, P_fh,maxFor the upper limit of cutting load.

In above-mentioned S103, Controlling model is coordinated according to the multiple resource for meeting constraints and determines that multiple resource coordinates control sequence Include with controlled quentity controlled variable is coordinated：

1st, object function is solved using heuritic approach, obtains multiple resource and coordinate control sequence, detailed process is as follows：

It is determined that with the object function of the minimum target of cutting load amount, determine to participate in coordinating the more of control using heuritic approach Resource action order, wherein, pumped storage cuts pump and dc power, and promptly load, accurate cutting load and cutting load loss are not lost in modulation Load, therefore, pumped storage cuts pump, dc power, and promptly modulation is higher compared to accurate cutting load, cutting load action priority；

Because pumped storage cuts pump and dc power, promptly load is not lost in modulation, but compared with dc power is promptly modulated, Pumped storage cuts pump and pertains only to local power network, and promptly modulation is related to sending end power network and receiving end power network to dc power, and operation cost is more Greatly, therefore pumped storage cuts pump action priority and is higher than dc power and promptly modulates；Compared to the direct losses load of cutting load, precisely Although cutting load also loses load, caused by influence it is smaller, therefore precisely cutting load action priority be higher than cutting load.

Therefore can obtain：Pumped storage cuts pump, dc power is promptly modulated, the priority of accurate cutting load, cutting load successively From high to low；It is preferential i.e. after failure that input control pumped storage cuts pump successively and dc power is promptly modulated, when control resource capacity still Deficiency, when can not recover the stabilization of power grids, then the accurate cutting load of input control, cutting load are considered successively, until the stabilization of power grids, according to So order carries out the control of resource, can reduce cutting load amount, realize optimization aim.

2nd, cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains pumped storage according to pumped storage Cut pump, dc power is promptly modulated, the coordination controlled quentity controlled variable of accurate cutting load and cutting load, detailed process is as follows：

2-1) cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load is taken out according to pumped storage Store the coordination controlled quentity controlled variable for cutting pump：

Make P_d、P_jz、P_fhThe initial value that pump amount is cut with pumped storage is 0, and the step-length increase P of pump is cut according to pumped storage_cx, now P_cx=P_cx,0+μ_cx, P_cx,0The initial value of pump amount, μ are cut for pumped storage_cxThe step-length of pump, μ are cut for pumped storage_cxDesirable 100MW；

2-2) cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains directly according to pumped storage The coordination controlled quentity controlled variable that stream power is promptly modulated：

Make P_jz、P_fhInitial value with the urgent modulation voltage of dc power is 0, and the step promptly modulated according to dc power Long increase P_d, now P_d=P_d,0+μ_d, P_d,0For the initial value of the urgent modulation voltage of dc power, μ_dPromptly modulated for dc power Step-length, μ_dDesirable 100MW；

2-3) cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains essence according to pumped storage The coordination controlled quentity controlled variable of quasi- cutting load：

Make P_fhInitial value with accurate cutting load amount is 0, and increases P according to the step-length of accurate cutting load_jz, now P_jz =P_jz,0+μ_jz, P_jz,0For the initial value of accurate cutting load amount, μ_jzFor the step-length of accurate cutting load, μ_jzDesirable 100MW；

2-4) cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load is cut according to pumped storage The coordination controlled quentity controlled variable of load：

The initial value for making cutting load amount is 0, and increases P according to the step-length of cutting load_fh, now P_fh=P_fh,0+μ_fh, P_fh,0 For the initial value of cutting load amount, μ_fhFor the step-length of cutting load, μ_fhDesirable 100MW；

In summary, P' is finally given_cx、P'_d、P'_jzAnd P'_fh。

Based on same inventive concept, the embodiment of the present invention 1 additionally provides a kind of direct current locking failure impact communication channel Multiple resource cooperative control device, these equipment solve the principle of problem and the multiple resource of direct current locking failure impact communication channel is assisted Control method is similar, and the multiple resource for the direct current locking failure impact communication channel that the embodiment of the present invention 1 provides coordinates control dress The first determining module, the second determining module and coordinating control module can be included by putting, and introduce above three module separately below Function：

First determining module therein, for determining the steady state stability limit of communication channel；

Second determining module therein, multiple resource is determined for coordinating Controlling model according to the multiple resource for meeting constraints Coordinate control sequence and coordinate controlled quentity controlled variable；Multiple resource, which coordinates Controlling model, to be included with the target of the minimum target structure of cutting load amount Function, institute's constraints determine according to the steady state stability limit of communication channel；

Coordinating control module therein, multiple resource association is carried out for coordinating control sequence according to multiple resource and coordinating controlled quentity controlled variable Regulation and control system.

The first above-mentioned determining module determines that the detailed process of the steady state stability limit of communication channel is as follows：

1st, the static active power of communication channel is set as 0, and direct current is closed based on steady-state load flow model and machine-electricity transient model Lock failure is emulated, and obtains the asynchronous oscillation center of the relative power-angle curve and tetanic weak alternating current net for referring to machine of generator；

2nd, judge whether to meet following two conditions simultaneously：

The second above-mentioned determining module is defined below the object function of formula：

F=min P_fh (1)

Wherein, F represents object function, P_fhRepresent cutting load amount.

Above-mentioned constraints includes inequality constraints of the weak communication channel in steady state stability limit, element in the steady pole of heat Inequality constraints, busbar voltage in limit cut the bound constraint of pump amount, direct current in the inequality constraints of bound scope, pumped storage The bound constraint of the urgent modulation voltage of power, the bound constraint of accurate cutting load amount and the bound constraint of cutting load amount, tool Body is as follows：

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim (2)

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max (3)

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max (4)

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max (5)

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max (6)

0≤P_cx≤P_cx,max (7)

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

0≤P_d≤P_d,max (8)

0≤P_jz≤P_jz,max (9)

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

(7) the bound constraint such as following formula of cutting load amount：

0≤P_fh≤P_fh,max (10)

Wherein, P_fh,maxFor the upper limit of cutting load.

Above-mentioned second determining module coordinates Controlling model according to the multiple resource for meeting constraints and determines that multiple resource coordinates control System order and coordination controlled quentity controlled variable also include：

1st, object function is solved using heuritic approach, obtains following multiple resource and coordinate control sequence：

In summary, P' is obtained_cx、P'_d、P'_jzAnd P'_fh。

Embodiment 2

Exemplified by scheming North China Power Telecommunication Network targeted manner year, the multiple resource of direct current locking failure impact communication channel is elaborated The detailed process of control method for coordinating：

Future targets year North China and other regional power grids between extra-high voltage alternating current-direct current interconnected network structural representation such as Fig. 2 Shown, the unit in Fig. 2 is ten thousand kilowatts, and North China and Central China Power Grid pass through extra-high voltage " Changzhi-Nanyang-Jingmen " (referred to as long south Line) interconnection, two kinds of methods of operation be present：Wet season, north sent (Central China to North China power transmission) and dry season south to send and (sent to Central China in North China Electricity).Entered and face on extra-high voltage direct-current, prick that blue or green power is each 10,000,000 kilowatts, eastern 4,000,000 kilowatts of the power of HVDC silver；Send spy outside HVDC tin is safe, Shanxi south power is respectively 750,8,000,000 kilowatts.

Extra-high voltage direct-current and long southern line, which all exist, sends and is entered two ways outside, and under direct current locking failure, alternating current-direct current is in the same direction (with give, with by) the southern line of length under transmission means gets over steady state stability limit and the risk of Transient Instability occurs than under incorgruous transmission means Height, Transient Instability causes to grow southern line off-the-line, and system scale, which reduces, after off-the-line is more easy to frequency of occurrences problem, and system operation risk adds Greatly.

Therefore the embodiment of the present invention 2 is based primarily upon long Nan Xianbei and send 5,500,000 kilowatts of typical ways to conduct a research, that is tackled is straight Flow 10,000,000 kilowatts of direct current locking failures that locking failure is feed-in Shandong.Analyzed using electric system simulations such as PSD-BPA soft It is the quasi-steady state mould based on the actual controllers of ABB that part, which builds steady-state load flow model and machine-electricity transient model, DC Model therein, Type.

First, determine that prevention and control direct current locking failure impact communication channel causes more controls of tetanic weak alternating current net destabilization problems to provide Source：

(1) tetanic weak alternating current net Failure Model caused by direct current locking failure impact communication channel：

Because North China have on face, prick blue or green, three, silver east and entered the nearly electrical distance of direct current and concentrate in drop point Shandong Province, it is and therein On face, eastern two direct currents of silver are that sending end is all located at the same of northwest Ningxia and sent, with by direct current, when N-2 occurs for exchange rack, single-phase opens The catastrophe failures such as tripping are closed, are easily caused more direct currents continuous commutation failure simultaneously, DC operation is lasting unstable, for protection direct current The purpose of apparatus body, direct current protecting will act and locking direct current, that is, the possibility of more direct currents locking simultaneously be present.

5,500,000 kilowatts are sent based on long Nan Xianbei, 400 Wan Qian Wa Yindong direct currents lockings of emulation, face direct current on 10,000,000 kilowatts Locking and on face, the transient power fluctuation of long southern line and off-the-line situation under the locking (14,000,000 kilowatts) simultaneously of eastern two direct currents of silver, than To the buckling form and the order of severity of impact of the direct current locking to weak communication channel under three kinds of modes of analysis.Under direct current locking failure The southern linear heat generation rate curve of cyclical fluctuations figure such as Fig. 3 of length, long southern line off-the-line situation such as table 1 under direct current locking difference impact strength；

Table 1

From the figure 3, it may be seen that the long southern line of direct current locking failure impact, generator rotor angle occurs for North China, Central China with respect to Transient Instability, triggers length Southern line off-the-line, the North China system generator rotor angle after off-the-line can keep stable, but due to having lacked that long Nan Xianbei send by electrical power and By the power for entering direct current locking, the system frequency after off-the-line persistently reduces, and low frequency be present；When as shown in Table 1, with off-the-line Between quickening, show that impact strength incrementally increases, risk is bigger, and strick precaution dynamics needs to strengthen.

(2) determine that North China Power Telecommunication Network controls resource more：

1) cutting load

Cutting load peace control is to tackle the important measure of electric network fault.Act under normal circumstances more early, control effect is better, In view of the time needed for peace control signal transmission and switch motion etc., 0.2s is acted after being usually set to failure；It is main to use collection Middle cutting load, perform station be typically chosen can provide necessity can the amount of cutting, transformer station in higher sensitivity, 110kV circuits in its station, 10kV feeder lines or 10kV main transformer switch are main excision object.As the capacity for the direct current that puts into operation is gradually increased, the measure is only taken, Control cost excessive.For the direct current of feed-in Shandong Power, the cutting load place of cutting load peace control is all located at Shandong Province after locking, Shandong cutting load amount adds up to 1,000,000 kilowatts.

2) pumped storage cuts pump

The startup optimization of pumped storage unit only needs 3-4 points to needing 1-2 minutes at full capacity by the State Transferring that draws water to generating electricity Clock, change working are rapid.When pumped storage operates in load condition, it can use and cut the traditional cutting load peace control of pump replacement, reach maintenance The stable purpose of system.

Target year, pumped storage controlled amounts in North China were 4,270,000 kilowatts, including Ming Tombs, Beijing pump-up power station (4*20), Southern Hebei Network River bend pump-up power station (4*25), Shanxi Xilongchi pump-up power station (4*30), tai shan pump-up power station (4*25) and Ji Bei is opened to take out Electric power storage station (3*9).

3) accurate cutting load

Traditional cutting load peace control technology is big to customer impact, may be selected to hold to cut off based on main transformer and high voltage load line Measure small, the realization of extensive cutting load is more difficult.Pacify control technology different from traditional cutting load, accurate cutting load is operation of power networks A kind of innovative technology, have it is multi-point and wide-ranging, selectivity it is strong, small to customer impact, can Millisecond realization be precisely controlled it is excellent Gesture, by being acted synergistically with traditional load control system, objective requirement of more direct current locking failures to a large amount of cutting loads can be met, It is the effective means for ensureing transitional period power grid security.

To tackle direct current locking failure, plan to promote accurate spatial load forecasting, North China Power Telecommunication Network in extra-high voltage direct-current receiving end province In the accurate cutting load resource of estimated 1,500,000 kilowatts of the total amount of deployment in the Shandong of feed-in direct current.

4) DC power modulation

Straight-flow system is highly controllable, governing speed is fast, has stronger power adjusting ability, coordinates using HVDC Modulation Conventional peace control measure, improving stability, reduces control cost.North China Power Telecommunication Network contain give, by and the multiple-circuit line deposited, such as when by When entering direct current generation locking failure, remaining can be sent outside to direct current and carry out the urgent prompt drop modulation of power.

(3) division of the outer resource of area's inner region

Using failure direct current drop point province power network as border, North China controllable resources can be defined as in area, resource outside area.For Face on feed-in Shandong for direct current locking, the pumped storage that resource is included in Shandong Province in area cuts pump and accurate, cutting load；Remaining Pumped storage cuts pump outside Shandong Province and to send the urgent power prompt drop of direct current outside be resource outside area drop point Shanxi, Xi Meng Jin Nan, Xi Tai.

2nd, determine to meet that the multiple resource of constraints coordinates control according to more control resources, communication channel steady state stability limit Simulation：

(1) with cutting load amount minimum target structure such as the object function of following formula：

F=min P_fh

Wherein, F represents object function, P_fhRepresent cutting load amount.

(2) constraints is determined：

Coordinate control measure solving the problems, such as outside long southern line, while corresponding constraints should be met, i.e., should not trigger China The other safety and stability problems of NORTEL net (may cause direct current opposite end power grid security problem, put aside) during modulation direct current.

Constraints includes inequality constraints of the weak communication channel in steady state stability limit, element (including circuit and change Depressor) inequality constraints in the hot steady limit, busbar voltage cut the upper of pump amount in the inequality constraints of bound scope, pumped storage Lower limit constraint, the bound constraint of the urgent modulation voltage of dc power, the bound constraint of accurate cutting load amount and cutting load amount Bound constrains, and introduces above-mentioned constraints separately below：

Inequality constraints of the weak communication channel in steady state stability limit such as following formula：

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max

Pumped storage cuts the bound constraint such as following formula of pump amount：

0≤P_cx≤P_cx,max

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

0≤P_d≤P_d,max

The bound constraint such as following formula of accurate cutting load amount：

0≤P_jz≤P_jz,max

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

The bound constraint such as following formula of cutting load amount：

0≤P_fh≤P_fh,max

Wherein, P_fh,maxFor the upper limit of cutting load.

3rd, Controlling model is coordinated according to the multiple resource for meeting constraints and determines that multiple resource coordinates control sequence and coordination is controlled Amount processed：

(1) object function is solved using heuritic approach, obtains following multiple resource and coordinate control sequence：

(2) cut that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load is taken out according to pumped storage Store cut pump, dc power is promptly modulated, the coordination controlled quentity controlled variable of accurate cutting load and cutting load, detailed process is as follows：

Pump is cut for pumped storage, can organize 4,270,000 kilowatts in North China target year；Accurate cutting load, cutting load are in direct current feed-in Inner tissue of Shandong Province, target year, accurate cutting load amount estimated 1,500,000 kilowatts.

Send direct current outside in the presence of 2 times in the domain of target year north China Region, that is, send outside 7,500,000 kilowatts extra-high voltage tin Thailand direct current, 8,000,000 Kilowatt Shanxi south direct current, face direct current latch-up problem on reply feed-in Shandong, need to two be sent outside with direct current, and to carry out power promptly fast Falling tone system, direct current prompt drop maximum can be down to 10% (reducing amplitude 90%)；Because the direct current running overload time is generally shorter, and it is electric The checkout time of net accident is indefinite, therefore is to avoid the dc power of reply accident from being lifted to cause direct current body long-time overload, Direct current ontological security is had influence on, puts aside the emergency lifting using dc power as measure.Therefore, the upper of feed-in Shandong is tackled Face direct current latch-up problem, other two direct currents in feed-in Shandong prick blue or green, silver-colored east and are not involved in coordinating control.

In area resource can direct current locking is brought in in-situ balancing area unbalanced power amount, do not have larger power and wear More, power grid security is influenceed smaller, therefore, pump, accurate cutting load, cutting load is cut without element in the hot steady limit in area Inequality constraints and busbar voltage the inequality constraints of bound scope check.Although cut pump control resource control outside area Amount processed is larger, but enforcement place is more scattered, to partial electric grid and the security implication for the contact with foreign countries section for cutting pump implementation province It is limited, more it is embodied on the security implication to Shandong Province's contact with foreign countries section.Send outside the prompt drop modulation voltage of direct current have it is larger abundant Degree, and place is concentrated, and except being had an impact to saving discontinuity surface, considerable influence is will also result near region power grid security.

Attached most importance to HVDC Modulation amount outside the area of analysis meter and power grid security, take into account and cut pump, set tin Thailand, Shanxi south two respectively Bar direct current prompt drop 10%, 20%, pump 4,270,000 is cut, analysis HVDC Modulation, cuts pump to direct current near region, the impact of province's discontinuity surface safety Influence, and determine HVDC Modulation amount outside rational area based on this, cut pump amount：A) pump (whole)+HVDC Modulation prompt drop is cut 10%+ cutting loads；B) pump (whole)+HVDC Modulation prompt drop 20% is cut, direct current near region and Xi Meng under tin Thailand direct current different modulating amount Base wind-powered electricity generation set end voltage schematic diagram is as shown in figure 4, tin Thailand direct current different modulating Liang Xia Xi Meng bases and the passage of major network interconnection Trend schematic diagram is as shown in Figure 5.

Tin Thailand direct current mainly conveys the wind thermoelectricity power in tin alliance power supply base, transitional period supporting power supply less investment, meanwhile, for The pressure of energy-saving and emission-reduction, supporting power supply, which will be developed, puts into large-scale wind power, wind-powered electricity generation reactive power support and fault ride-through capacity deficiency, with Power network coupling operation risk increases；Tin alliance power supply base only passes through Xi Meng-triumph-Langfang extra-high voltage direct-current point pair with North China major network Net connects over long distances, and grid structure is relatively weak, to meet tin Thailand direct current 7500MW transmission power, from the transmission of electricity of North China major network about 3000MW gives Xi Meng bases.

After tin alliance direct current prompt drop, " liquidating " is formed with the trend of major network conveying, alleviates tin alliance direct current near region trend, voltage Rise by a relatively large margin, the grid-connected weak reactive power support of large-scale wind power exacerbates soaring amplitude.From Fig. 4 and Fig. 5, direct current prompt drop 10% relative to 20%, and direct current transmission power reduces 750MW, Xi Meng-triumph-Langfang steady-state load flow by 2300MW reduce to 1570MW, tin Thailand DC converter busbar voltage increase to 1.07p.u. by 1.03p.u. (543.4kV, reference voltage 525kV) (562kV) left and right, near region wind-powered electricity generation set end voltage increase to 1.09p.u. or so by 1.056p.u, overvoltage problem (stable state mistake be present Voltage limits 550kV), wind-powered electricity generation also passes through performance deficiency because of high voltage fault, chain off-grid risk be present.Shanxi south direct current near region rack Relatively strong, No-mistake Principle, voltage problem, multiple resource coordinate the lower Shanxi south direct current near region of control and save discontinuity surface Power flow simulation schematic diagram as schemed Shown in 6, multiple resource coordinates the lower Shanxi south direct current near region of control and province's discontinuity surface node voltage emulation schematic diagram is as shown in Figure 7.By Fig. 6 System is understood without remaining safety problem with Fig. 7, and province's discontinuity surface trend fluctuation is larger, but without out-of-limit problem, voltage pulsation is reasonable Scope.

To sum up, can when tin Thailand direct current such as takes the measure of prompt drop power 20% to get over steady state stability limit problem to tackle long southern line Other safety and stability problems can be brought, therefore, it is suggested that tin Thailand direct current maximum prompt drop amplitude is 10%.Similarly, for the ease of Implement, the prompt drop amplitude of Shanxi south direct current is also set to 10% in addition；Because no initiation saves discontinuity surface and cuts pump near region Safety and stability problem, therefore do not adjusted for 4,270,000 kilowatts of pump amount of cutting.

Implement to cut 4,270,000 kilowatts of pump, Xi Tai, southern two direct currents in Shanxi add up to 1,550,000 kilowatts of prompt drop (the 10% of dc power), The peace control measure of 1,000,000 kilowatts of load of excision is further taken after accurate 1,500,000 kilowatts of cutting load, coordinates to control as multiple resource Measure, multiple resource coordinate control with being acted without the southern linear heat generation rate curve comparison schematic diagram of length under measure as shown in figure 8, pressing multiple resource Sequentially, actuating quantity is implemented to coordinate the load loss statistical conditions such as table 2 under control successively：

Table 2

From Fig. 8 and table 2, multiple resource sequence of movement, action after the generation of direct current locking failure according to heuristic determination Amount implements to coordinate successively control, and long southern line not off-the-line, system is stable, while effective lifting system security, cutting load damage Mistake gradually reduces, and maximum can reduce by 9,000,000 kilowatts, reduces the control cost that weak communication channel is impacted in the locking of reply direct current, real The optimization aim for coordinating Controlling model is showed.

4th, coordinate control sequence according to multiple resource and coordinate controlled quentity controlled variable to carry out multiple resource coordination control：

Under North China Power Telecommunication Network target year typical way, locking occurs for the 10000000 kilowtt HVDCs in reply feed-in Shandong Extra-high voltage that failure is brought grows southern line and gets over steady state stability limit the problem of unstability, and proposition can effectively reduce control cost, lifting control The multiple resource coordination control strategy of validity.Direct current locking failure impacts the multiple resource coordination control strategy signal of weak communication channel Figure is as shown in Figure 9：

Coordinating control resource includes：Pumped storage cuts pump, sends the urgent prompt drop modulation of dc power, accurate cutting load, cutting load outside；

It is as follows to coordinate control sequence：

Preferential pumped storage of implementing cuts pump and sends the urgent prompt drop modulation of dc power outside, and secondly accurate cutting load, finally implements again Cutting load peace control；

It is as follows to coordinate control action amount：

Pumped storage cut 4,270,000 kilowatts of pump, send outside direct current prompt drop modulate 1,550,000 kilowatts, 1,500,000 kilowatts of accurate cutting load, cut it is negative 1,000,000 kilowatts of lotus peace control.

For convenience of description, each several part of apparatus described above is divided into various modules with function or unit describes respectively. Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.

It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program Product.Therefore, the application can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Apply the form of example.Moreover, the application can use the computer for wherein including computer usable program code in one or more The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.

The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.

These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.

Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention embodiment modify or Equivalent substitution, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent substitution Within bright claims.

Claims

A kind of 1. multiple resource control method for coordinating of direct current locking failure impact communication channel, it is characterised in that including：

Determine the steady state stability limit of communication channel；

Multiple resource according to constraints is met coordinates Controlling model and determines that multiple resource coordinates control sequence and coordinates controlled quentity controlled variable；Institute State multiple resource and coordinate the object function that Controlling model includes building with the minimum target of cutting load amount, the constraints is according to friendship The steady state stability limit of circulation road determines；

Control sequence is coordinated according to multiple resource and coordinates controlled quentity controlled variable carrying out multiple resource coordination control.
2. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 1, its feature It is, the steady state stability limit for determining communication channel includes：

If the static active power of communication channel is 0, based on steady-state load flow model and machine-electricity transient model to direct current locking failure Emulated, obtain the asynchronous oscillation center of the relative power-angle curve and tetanic weak alternating current net for referring to machine of generator；

Judge whether to meet following two conditions simultaneously：

1) the relative generator rotor angle with reference to machine of generator is more than 360 degree, and the generator with being located at the two of communication channel with reference to machine respectively Side；

2) the asynchronous oscillation center of tetanic weak alternating current net falls on weak communication channel；

If so, then communication channel reaches steady state stability limit, dynamic wattful power of the record communication channel in steady state stability limit Rate peak value, and the steady stability pole using dynamic active power peak value of the communication channel in steady state stability limit as communication channel Limit；Otherwise the static active power of communication channel is increased into 50MW, return is based on steady-state load flow model and machine-electricity transient model pair Direct current locking failure is emulated, and performs subsequent operation.
3. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 1 or 2, it is special Sign is, the object function such as following formula：

F=min P_fh (1)

Wherein, F represents object function, P_fhRepresent cutting load amount.
4. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 3, its feature It is, the constraints includes inequality constraints of the weak communication channel in steady state stability limit, element in the hot steady limit Inequality constraints, busbar voltage bound constraint, the dc power of pump amount are cut in the inequality constraints of bound scope, pumped storage The bound constraint of urgent modulation voltage, the bound constraint of accurate cutting load amount and the bound constraint of cutting load amount.
5. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 4, its feature It is, inequality constraints such as following formula of the weak communication channel in steady state stability limit：

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim (2)

Wherein, S₀For the dynamic active power peak value of communication channel after direct current locking failure, S_limFor the steady stability of communication channel The limit, Δ S (P_cx,P_d,P_jz,P_fh) be communication channel dynamic active power peak value knots modification, P_cxPump amount, P are cut for pumped storage_dFor The urgent modulation voltage of dc power, P_jzFor accurate cutting load amount, P_fhFor cutting load amount, cx represents that pumped storage cuts pump resource, and d represents straight The urgent modulation resources of power are flowed, jz represents accurate cutting load resource, and fh represents cutting load resource；

Inequality constraints such as following formula of the element in the hot steady limit：

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max (3)

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max (4)

Wherein, P_s,0To save the initial active power of element in discontinuity surface near region, P_s,maxIt is steady to save the heat of element in discontinuity surface near region The limit, Δ P_s(P_cx,P_d,P_jz,P_fh) it is the active power knots modification for saving element in discontinuity surface near region；P_c,0To control place near region The initial active power of middle element, P_c,maxFor the hot steady limit of element in control place near region, Δ P_c(P_cx,P_d,P_jz,P_fh) be Control the active power knots modification of element in the near region of place；

Inequality constraints such as following formula of the busbar voltage in bound scope：

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max (5)

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max (6)

Wherein, U_s,minAnd U_s,maxRespectively save the lower and upper limit of discontinuity surface near region median generatrix voltage, U_s,0To save discontinuity surface near region The initial voltage of median generatrix, Δ U_s(P_cx,P_d,P_jz,P_fh) it is the knots modification for saving discontinuity surface near region median generatrix voltage；U_c,minWith U_c,maxRespectively control the lower and upper limit of place near region median generatrix voltage, U_c,0To control the initial electricity of place near region median generatrix Pressure, Δ U_c(P_cx,P_d,P_jz,P_fh) it is control place near region median generatrix voltage knots modification；

The pumped storage cuts the bound constraint such as following formula of pump amount：

0≤P_cx≤P_cx,max (7)

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

The bound constraint such as following formula of the urgent modulation voltage of dc power：

0≤P_d≤P_d,max (8)

Wherein, P_d,maxThe upper limit promptly modulated for dc power, when dc power, which is promptly modulated to speed, increases modulation, P_d,maxTo be straight Flow the upper limit that the urgent speed of power increases, value 10%P_d,e；When dc power is promptly modulated to prompt drop modulation, P_d,maxFor direct current The upper limit that power is promptly modulated, value 90%P_d,e, P_d,eFor the active power of DC transmission system conveying；

The bound constraint such as following formula of the precisely cutting load amount：

0≤P_jz≤P_jz,max (9)

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

The bound constraint such as following formula of the cutting load amount：

0≤P_fh≤P_fh,max (10)

Wherein, P_fh,maxFor the upper limit of cutting load.
6. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 5, its feature It is, it is described to determine that multiple resource coordinates control sequence and coordination controls according to the multiple resource coordination Controlling model for meeting constraints Amount includes：

Object function is solved using heuritic approach, following multiple resource is obtained and coordinates control sequence：

Pumped storage cuts pump, dc power is promptly modulated, the priority of accurate cutting load, cutting load successively from high to low；

According to pumped storage cut pump, dc power promptly modulate, the coordination control sequence of accurate cutting load, cutting load obtain pumped storage cut pump, Dc power is promptly modulated, the coordination controlled quentity controlled variable of accurate cutting load and cutting load.
7. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 6, its feature It is, cuts that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains pumped storage and cut according to pumped storage The coordination controlled quentity controlled variable of pump includes：

Make P_d、P_jz、P_fhThe initial value that pump amount is cut with pumped storage is 0, and the step-length increase P of pump is cut according to pumped storage_cx, now P_cx= P_cx,0+μ_cx, P_cx,0The initial value of pump amount, μ are cut for pumped storage_cxThe step-length of pump is cut for pumped storage；

Check P_cxWhether formula (7) is met, if being unsatisfactory for formula (7), pumped storage cuts the coordination controlled quentity controlled variable P ' of pump_cx=P_cx-μ_cx；Otherwise school Core P_cxWhether formula (3)-(6) are met simultaneously；

If P_cxAsynchronously meet formula (3)-(6), P '_cx=P_cx-μ_cx；Otherwise P is checked_cxWhether formula (2) is met；

If P_cxMeet formula (2), P '_cx=P_cx, coordination controlled quentity controlled variable P ' that dc power is promptly modulated_d, accurate cutting load coordination control Amount P ' processed_jzWith the tune controlled quentity controlled variable P ' of cutting load association_fhIt is 0；Otherwise it is P that the pumped storage for making now, which cuts pump amount,_cx,0, and return to basis and take out Store the step-length increase P for cutting pump_cx, and subsequent operation is performed, until obtaining P '_cx。
8. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 7, its feature It is, cuts that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains direct current work(according to pumped storage The coordination controlled quentity controlled variable that rate is promptly modulated includes：

Make P_jz、P_fhInitial value with the urgent modulation voltage of dc power is 0, and the step-length increase promptly modulated according to dc power P_d, now P_d=P_d,0+μ_d, P_d,0For the initial value of the urgent modulation voltage of dc power, μ_dThe step-length promptly modulated for dc power；

Check P_dWhether formula (8) is met, if being unsatisfactory for formula (8), P '_d=P_d-μ_d；Otherwise according to P '_cxCheck P_dWhether meet simultaneously Formula (3)-(6)；

If asynchronously meet formula (3)-(6), P '_d=P_d-μ_d；Otherwise according to P '_cxCheck P_dWhether formula (2) is met；

If P_dMeet formula (2), P '_d=P_d, P '_jzWith P '_fhIt is 0；Otherwise it is P to make the urgent modulation voltage of dc power now_d,0, and Returning to the step-length promptly modulated according to dc power increases P_d, and subsequent operation is performed, until obtaining P '_d。
9. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 8, its feature It is, cuts that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load is precisely cut according to pumped storage The coordination controlled quentity controlled variable of load includes：

Make P_fhInitial value with accurate cutting load amount is 0, and increases P according to the step-length of accurate cutting load_jz, now P_jz=P_jz,0 +μ_jz, P_jz,0For the initial value of accurate cutting load amount, μ_jzFor the step-length of accurate cutting load；

Check P_jzWhether formula (9) is met, if being unsatisfactory for formula (9), P '_jz=P_jz-μ_jz；Otherwise according to P '_cxWith P '_dCheck P_jzWhether Meet formula (3)-(6) simultaneously；

If P_jzAsynchronously meet formula (3)-(6), P '_jz=P_jz-μ_jz；Otherwise according to P '_cxWith P '_dCheck P_jzWhether formula (2) is met；

If P_jzMeet formula (2), P '_jz=P_jz, P '_fhFor 0；Otherwise it is P to make accurate cutting load amount now_jz,0, and return according to essence The step-length increase P of quasi- cutting load_jz, and subsequent operation is performed, until obtaining P '_jz。
10. the multiple resource control method for coordinating of direct current locking failure impact communication channel according to claim 9, its feature It is, cuts that pump, dc power are promptly modulated, the coordination control sequence of accurate cutting load, cutting load obtains cutting load according to pumped storage Coordination controlled quentity controlled variable include：

The initial value for making cutting load amount is 0, and increases P according to the step-length of cutting load_fh, now P_fh=P_fh,0+μ_fh, P_fh,0To cut The initial value of load, μ_fhFor the step-length of cutting load；

Check P_fhWhether formula (10) is met, if being unsatisfactory for formula (10), P '_fh=P_fh-μ_fh；Otherwise according to P '_cx、P′_dWith P '_jzCheck P_fhWhether formula (3)-(6) are met simultaneously；

If P_fhAsynchronously meet formula (3)-(6), P '_fh=P_fh-μ_fh；Otherwise according to P '_cx、P′_dWith P '_jzCheck P_fhWhether formula is met (2)；

If P_fhMeet formula (2), P '_fh=P_fh；Otherwise it is P to make cutting load amount now_fh,0, return increases according to the step-length of cutting load P_fh, and subsequent operation is performed, until obtaining P '_fh。
A kind of 11. multiple resource cooperative control device of direct current locking failure impact communication channel, it is characterised in that including：

First determining module, for determining the steady state stability limit of communication channel；

Second determining module, determine that multiple resource coordination control is suitable for coordinating Controlling model according to the multiple resource for meeting constraints Sequence and coordination controlled quentity controlled variable；The multiple resource, which coordinates Controlling model, to be included with the object function of the minimum target structure of cutting load amount, The constraints determines according to the steady state stability limit of communication channel；

Coordinating control module, multiple resource coordination control is carried out for coordinating control sequence according to multiple resource and coordinating controlled quentity controlled variable.
12. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 11, it is special Sign is that first determining module is specifically used for：

If the static active power of communication channel is 0, based on steady-state load flow model and machine-electricity transient model to direct current locking failure Emulated, obtain the asynchronous oscillation center of the relative power-angle curve and tetanic weak alternating current net for referring to machine of generator；

Judge whether to meet following two conditions simultaneously：

1) the relative generator rotor angle with reference to machine of generator is more than 360 degree, and the generator with being located at the two of communication channel with reference to machine respectively Side；

2) the asynchronous oscillation center of tetanic weak alternating current net falls on weak communication channel；

If so, then communication channel reaches steady state stability limit, dynamic wattful power of the record communication channel in steady state stability limit Rate peak value, and the steady stability pole using dynamic active power peak value of the communication channel in steady state stability limit as communication channel Limit；Otherwise the static active power of communication channel is increased into 50MW, return is based on steady-state load flow model and machine-electricity transient model pair Direct current locking failure is emulated, and performs subsequent operation.
13. the multiple resource cooperative control device of the direct current locking failure impact communication channel according to claim 11 or 12, Characterized in that, second determining module is specifically used for：

It is defined below the object function of formula：

F=min P_fh (1)

Wherein, F represents object function, P_fhRepresent cutting load amount.
14. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 13, it is special Sign is, the constraints includes inequality constraints of the weak communication channel in steady state stability limit, element in the steady limit of heat Interior inequality constraints, busbar voltage cut the bound constraint of pump amount, direct current work(in the inequality constraints of bound scope, pumped storage The bound constraint of the urgent modulation voltage of rate, the bound constraint of accurate cutting load amount and the bound constraint of cutting load amount.
15. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 14, it is special Sign is, inequality constraints such as following formula of the weak communication channel in steady state stability limit：

S₀-ΔS(P_cx,P_d,P_jz,P_fh)≤S_lim (2)

Wherein, S₀For the dynamic active power peak value of communication channel after direct current locking failure, S_limFor the steady stability of communication channel The limit, Δ S (P_cx,P_d,P_jz,P_fh) be communication channel dynamic active power peak value knots modification, P_cxPump amount, P are cut for pumped storage_dFor The urgent modulation voltage of dc power, P_jzFor accurate cutting load amount, P_fhFor cutting load amount, cx represents that pumped storage cuts pump resource, and d represents straight The urgent modulation resources of power are flowed, jz represents accurate cutting load resource, and fh represents cutting load resource；

Inequality constraints such as following formula of the element in the hot steady limit：

P_s,0+ΔP_s(P_cx,P_d,P_jz,P_fh)≤P_s,max (3)

P_c,0+ΔP_c(P_cx,P_d,P_jz,P_fh)≤P_c,max (4)

Wherein, P_s,0To save the initial active power of element in discontinuity surface near region, P_s,maxIt is steady to save the heat of element in discontinuity surface near region The limit, Δ P_s(P_cx, P_d, P_jz, P_fh) it is the active power knots modification for saving element in discontinuity surface near region；P_c,0To control place near region The initial active power of middle element, P_c,maxFor the hot steady limit of element in control place near region, Δ P_c(P_cx,P_d,P_jz,P_fh) be Control the active power knots modification of element in the near region of place；

Inequality constraints such as following formula of the busbar voltage in bound scope：

U_s,min≤U_s,0+ΔU_s(P_cx,P_d,P_jz,P_fh)≤U_s,max (5)

U_c,min≤U_c,0+ΔU_c(P_cx,P_d,P_jz,P_fh)≤U_c,max (6)

Wherein, U_s,minAnd U_s,maxRespectively save the lower and upper limit of discontinuity surface near region median generatrix voltage, U_s,0To save discontinuity surface near region The initial voltage of median generatrix, Δ U_s(P_cx,P_d,P_jz,P_fh) it is the knots modification for saving discontinuity surface near region median generatrix voltage；U_c,minWith U_c,maxRespectively control the lower and upper limit of place near region median generatrix voltage, U_c,0To control the initial electricity of place near region median generatrix Pressure, Δ U_c(P_cx,P_d,P_jz,P_fh) it is control place near region median generatrix voltage knots modification；

The pumped storage cuts the bound constraint such as following formula of pump amount：

0≤P_cx≤P_cx,max (7)

Wherein, P_cx,maxThe upper limit of pump is cut for pumped storage；

The bound constraint such as following formula of the urgent modulation voltage of dc power：

0≤P_d≤P_d,max (8)

Wherein, P_d,maxThe upper limit promptly modulated for dc power, when dc power, which is promptly modulated to speed, increases modulation, P_d,maxTo be straight Flow the upper limit that the urgent speed of power increases, value 10%P_d,e；When dc power is promptly modulated to prompt drop modulation, P_d,maxFor direct current The upper limit that power is promptly modulated, value 90%P_d,e, P_d,eFor the active power of DC transmission system conveying；

The bound constraint such as following formula of the precisely cutting load amount：

0≤P_jz≤P_jz,max (9)

Wherein, P_jz,maxFor the upper limit of accurate cutting load；

The bound constraint such as following formula of the cutting load amount：

0≤P_fh≤P_fh,max (10)

Wherein, P_fh,maxFor the upper limit of cutting load.
16. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 15, it is special Sign is that second determining module is specifically used for：

Object function is solved using heuritic approach, following multiple resource is obtained and coordinates control sequence：

Pumped storage cuts pump, dc power is promptly modulated, the priority of accurate cutting load, cutting load successively from high to low；

According to pumped storage cut pump, dc power promptly modulate, the coordination control sequence of accurate cutting load, cutting load obtain pumped storage cut pump, Dc power is promptly modulated, the coordination controlled quentity controlled variable of accurate cutting load and cutting load.
17. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 16, it is special Sign is that second determining module is specifically used for：

Make P_d、P_jz、P_fhThe initial value that pump amount is cut with pumped storage is 0, and the step-length increase P of pump is cut according to pumped storage_cx, now P_cx= P_cx,0+μ_cx, P_cx,0The initial value of pump amount, μ are cut for pumped storage_cxThe step-length of pump is cut for pumped storage；

Check P_cxWhether formula (7) is met, if being unsatisfactory for formula (7), pumped storage cuts the coordination controlled quentity controlled variable P ' of pump_cx=P_cx-μ_cx；Otherwise school Core P_cxWhether formula (3)-(6) are met simultaneously；

If P_cxAsynchronously meet formula (3)-(6), P '_cx=P_cx-μ_cx；Otherwise P is checked_cxWhether formula (2) is met；

If P_cxMeet formula (2), P '_cx=P_cx, coordination controlled quentity controlled variable P ' that dc power is promptly modulated_d, accurate cutting load coordination control Amount P ' processed_jzWith the tune controlled quentity controlled variable P ' of cutting load association_fhIt is 0；Otherwise it is P that the pumped storage for making now, which cuts pump amount,_cx,0, and return to basis and take out Store the step-length increase P for cutting pump_cx, and subsequent operation is performed, until obtaining P '_cx。
18. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 17, it is special Sign is that second determining module is specifically used for：

Make P_jz、P_fhInitial value with the urgent modulation voltage of dc power is 0, and the step-length increase promptly modulated according to dc power P_d, now P_d=P_d,0+μ_d, P_d,0For the initial value of the urgent modulation voltage of dc power, μ_dThe step-length promptly modulated for dc power；

Check P_dWhether formula (8) is met, if being unsatisfactory for formula (8), P '_d=P_d-μ_d；Otherwise according to P '_cxCheck P_dWhether meet simultaneously Formula (3)-(6)；

If asynchronously meet formula (3)-(6), P '_d=P_d-μ_d；Otherwise according to P '_cxCheck P_dWhether formula (2) is met；

If P_dMeet formula (2), P '_d=P_d, P '_jzWith P '_fhIt is 0；Otherwise it is P to make the urgent modulation voltage of dc power now_d,0, and Returning to the step-length promptly modulated according to dc power increases P_d, and subsequent operation is performed, until obtaining P '_d。
19. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 18, it is special Sign is that second determining module is specifically used for：

Make P_fhInitial value with accurate cutting load amount is 0, and increases P according to the step-length of accurate cutting load_jz, now P_jz=P_jz,0 +μ_jz, P_jz,0For the initial value of accurate cutting load amount, μ_jzFor the step-length of accurate cutting load；

Check P_jzWhether formula (9) is met, if being unsatisfactory for formula (9), P '_jz=P_jz-μ_jz；Otherwise according to P '_cxWith P '_dCheck P_jzWhether Meet formula (3)-(6) simultaneously；

If P_jzAsynchronously meet formula (3)-(6), P '_jz=P_jz-μ_jz；Otherwise according to P '_cxWith P '_dCheck P_jzWhether formula (2) is met；

If P_jzMeet formula (2), P '_jz=P_jz, P '_fhFor 0；Otherwise it is P to make accurate cutting load amount now_jz,0, and return according to essence The step-length increase P of quasi- cutting load_jz, and subsequent operation is performed, until obtaining P '_jz。
20. the multiple resource cooperative control device of direct current locking failure impact communication channel according to claim 19, it is special Sign is that second determining module is specifically used for：

The initial value for making cutting load amount is 0, and increases P according to the step-length of cutting load_fh, now P_fh=P_fh,0+μ_fh, P_fh,0To cut The initial value of load, μ_fhFor the step-length of cutting load；

Check P_fhWhether formula (10) is met, if being unsatisfactory for formula (10), P '_fh=P_fh-μ_fh；Otherwise according to P '_cx、P′_dWith P '_jzCheck P_fhWhether formula (3)-(6) are met simultaneously；

If P_fhAsynchronously meet formula (3)-(6), P '_fh=P_fh-μ_fh；Otherwise according to P '_cx、P′_dWith P '_jzCheck P_fhWhether formula is met (2)；

If P_fhMeet formula (2), P '_fh=P_fh；Otherwise it is P to make cutting load amount now_fh,0, return increases according to the step-length of cutting load P_fh, and subsequent operation is performed, until obtaining P '_fh。