CN106169759A - A kind of distribution network voltage control method and system - Google Patents

Abstract

This application discloses a kind of distribution network voltage control method and system, the method includes: after power distribution network breaks down, and calculates corresponding reactive power compensation on the spot amount；According to reactive power compensation on the spot amount, power distribution network is carried out reactive power compensation on the spot；After power distribution network reactive power compensation on the spot balances, then power distribution network is carried out inverse regulation voltage process, so that the node voltage of whole nodes recovers normal level in power distribution network.Visible, the application is after power distribution network breaks down, facility carries out reactive power compensation on the spot by calculated reactive power compensation on the spot amount to power distribution network, until after power distribution network reactive power compensation on the spot balances, just power distribution network is carried out inverse regulation voltage process, it is thus possible to make the node voltage of whole nodes in power distribution network recover normal level, thus achieve the purpose that after power distribution network breaks down, power distribution network is carried out voltage-regulation.

Description

A kind of distribution network voltage control method and system

Technical field

The present invention relates to distribution network voltage regulation technology field, particularly to a kind of distribution network voltage control method and be System.

Background technology

At present, the power distribution network broken down is after Fault Isolation, if recovering power transmission, then and may be negative due to a large amount of transfers The underproof situation of the caused distribution network voltage of lotus, needs power distribution network is carried out quick power flow regulating.Adjust in distribution power flow Joint problem aspect, people mainly carry out power flow regulating with power transmission network for object of study, in the power flow regulating method of power transmission network, its The feature of object of study is: 1) through-put power is mainly active power, and the whole network reactive requirement more equalizes；2) nothing of annular electrical network Merit transmission is more flexible, and idle long-distance transmissions can't cause being greatly reduced of voltage；3) reactive power source contain power plant and Compensate electric capacity, the whole network is distributed and more disperses.Visible, in the power flow regulating method of power transmission network, mainly to be layered load factor Based on Reactive-power control, the most idle hierarchical and regional balance and voltage are qualified.

But, in actual high-voltage or medium voltage distribution network, 1) and idle proportion significantly increases in through-put power, different The reactive requirement of user differs greatly, and the reactive requirement of each distribution transformer terminals is the most uneven；2) distribution network structure is radial pattern Structure, idle main from transformer station's long-distance sand transport；3) reactive-load compensation in reactive power source only has transformer station, distribution low-pressure side The a small amount of distributed power source accessed in reactive compensation cabinet, and 10kV electrical network；4) trend infeasible solution former of power distribution network is caused Because there being node voltage amplitude defective, distributed power source idle is exerted oneself out-of-limit, or both reasons all exist.It is layered for this Load factor size can not the reactive load situation of exact representation whole piece feeder line.That is, existing power transmission network power flow regulating method It is difficult to apply to power distribution network is carried out power flow regulating.

In sum it can be seen that how power distribution network carries out after power distribution network breaks down voltage-regulation is to need at present The problem solved.

Summary of the invention

In view of this, it is an object of the invention to provide a kind of distribution network voltage control method and system, it is achieved that joining After electrical grid failure, power distribution network is carried out the purpose of voltage-regulation.Its concrete scheme is as follows:

A kind of distribution network voltage control method, including:

After power distribution network breaks down, calculate corresponding reactive power compensation on the spot amount；

According to described reactive power compensation on the spot amount, described power distribution network is carried out reactive power compensation on the spot；

After described power distribution network reactive power compensation on the spot balances, then described power distribution network is carried out inverse regulation voltage process, so that described In power distribution network, the node voltage of whole nodes recovers normal level.

Preferably, before described calculating corresponding reactive power compensation on the spot amount, the idle of described power distribution network is also comprised determining that Loading level.

Preferably, when the reactive load degree of described power distribution network is more than the first predetermined threshold value, then calculate described idle on the spot The computing formula of compensation dosage is:

In formula, Δ Q_cRepresent described reactive power compensation on the spot amount；Q_c,aimRepresent preferable reactive-load compensation amount；Round (*) represents four House five enters rounding function；Q₁Represent the idle amount that the feeder line headend node of described power distribution network is injected to described power distribution network；P₁Represent institute State the active power that feeder line headend node is injected；Represent ideal power factor；Q_cRepresent the nothing put in described power distribution network Merit compensation dosage；Q_c,maxRepresent the higher limit of the reactive-load compensation amount that can put in described power distribution network.

Preferably, described according to described reactive power compensation on the spot amount, described power distribution network is carried out the process of reactive power compensation on the spot, Including:

The idle capacitance consistent with described reactive power compensation on the spot amount size is put into described power distribution network.

Preferably, when the reactive load degree of described power distribution network is less than or equal to the second predetermined threshold value, then described nothing is calculated The computing formula of merit local compensation amount is:

In formula, Δ Q_cRepresent described reactive power compensation on the spot amount；Q_c,aimRepresent preferable reactive-load compensation amount；Round (*) represents four House five enters rounding function；Q₁Represent the idle amount that the feeder line headend node of described power distribution network is injected to described power distribution network；P₁Represent institute State the active power that feeder line headend node is injected；Represent ideal power factor；Q_cRepresent the nothing put in described power distribution network Merit compensation dosage；Q_c,minRepresent the lower limit of the reactive-load compensation amount that can put in described power distribution network.

Preferably, described according to described reactive power compensation on the spot amount, described power distribution network is carried out the process of reactive power compensation on the spot, Including:

Excise idle capacitance consistent with described reactive power compensation on the spot amount size in described power distribution network.

Preferably, the described process that described power distribution network is carried out inverse regulation voltage process, including:

Described power distribution network is carried out Load flow calculation, then according to the node voltage of feeder line headend node after Load flow calculation, adopts Take the mode of regulation main shift, described power distribution network is carried out inverse regulation voltage process.

Preferably, after described power distribution network is carried out Load flow calculation, if the reactive load degree of described power distribution network is more than the Three predetermined threshold value, then calculate the required increment of adjustment of current main transformer no-load voltage ratio, then according to described required increment of adjustment, main to promote The voltage regulating mode of shift position carries out boosting process to described power distribution network；Wherein, the computing formula of described required increment of adjustment is:

$\left\{\begin{array}{c}{k}_{aim}=min\{{\mathrm{\Δk}}_0\×round\left(\frac{V_1+{\mathrm{\ΔV}}_{lower}}{S_{Vk}\×{\mathrm{\Δk}}_0}\right),k_{max}\}\\ {\mathrm{\ΔV}}_{lower}=min\{{\mathrm{GV}}_{lower},V_{max}-V_1\}\\ \mathrm{\Δ}k=k_{aim}-k\end{array}\right.;$

In formula, k_aimRepresent current preferably main transformer no-load voltage ratio, Δ k₀Represent the unit extreme difference of main transformer no-load voltage ratio, round (*) table Show the rounding function that rounds up, V₁Representing the node voltage of the feeder line headend node of described power distribution network, k represents working as of main transformer no-load voltage ratio Front value, S_VkRepresent the node voltage V of described feeder line headend node₁Sensitivity coefficient to the currency k of described main transformer no-load voltage ratio, k_maxRepresent the higher limit of main transformer no-load voltage ratio, GV_lowerRepresent that all node interior joint voltages of presently described power distribution network surmount under voltage The maximum offset of limit, Δ k represents described required increment of adjustment.

Preferably, after described power distribution network is carried out Load flow calculation, if the reactive load degree of described power distribution network less than or Equal to the 4th predetermined threshold value, then calculate the required regulation decrement of current main transformer no-load voltage ratio, then according to described required regulation decrement, with The voltage regulating mode reducing main shift carries out blood pressure lowering process to described power distribution network；Wherein, the calculating of described required regulation decrement is public Formula is:

$\left\{\begin{array}{c}{k}_{aim}=min\{{\mathrm{\Δk}}_0\×round\left(\frac{V_1-{\mathrm{\ΔV}}_{upper}}{S_{Vk}\×{\mathrm{\Δk}}_0}\right),k_{min}\}\\ {\mathrm{\ΔV}}_{upper}=\min \{{\mathrm{GV}}_{upper},V_1-V_{\min }\}\\ \mathrm{\Δ}k=k-k_{aim}\end{array}\right.;$

In formula, k_aimRepresent current preferably main transformer no-load voltage ratio, Δ k₀Represent the unit extreme difference of main transformer no-load voltage ratio, round (*) table Show the rounding function that rounds up, V₁Representing the node voltage of the feeder line headend node of described power distribution network, k represents working as of main transformer no-load voltage ratio Front value, S_VkRepresent the node voltage V of described feeder line headend node₁Sensitivity coefficient to the currency k of described main transformer no-load voltage ratio, k_minRepresent the lower limit of main transformer no-load voltage ratio, GV_upperRepresent that all node interior joint voltages of presently described power distribution network surmount on voltage The maximum offset of limit, Δ k represents described required regulation decrement.

The invention also discloses a kind of distribution network voltage regulation system, including:

Compensation dosage computing module, for after power distribution network breaks down, calculates corresponding reactive power compensation on the spot amount；

Reactive power compensation on the spot equipment, for according to described reactive power compensation on the spot amount, described power distribution network is carried out idle on the spot Compensate；

Inverse regulation voltage equipment, after balancing when described power distribution network reactive power compensation on the spot, then carries out inverse tune to described power distribution network Pressure processes, so that the node voltage of whole nodes recovers normal level in described power distribution network.

In the present invention, distribution network voltage control method includes: after power distribution network breaks down, calculate the most idle on the spot Compensation dosage；According to reactive power compensation on the spot amount, power distribution network is carried out reactive power compensation on the spot；When power distribution network reactive power compensation on the spot balances After, then power distribution network is carried out inverse regulation voltage process, so that the node voltage of whole nodes recovers normal level in power distribution network.It is visible, The present invention is after power distribution network breaks down, and convenient carrying out power distribution network by calculated reactive power compensation on the spot amount idle is mended on the spot Repay, until after power distribution network reactive power compensation on the spot balances, just power distribution network being carried out inverse regulation voltage process such that it is able to make in power distribution network complete The node voltage of portion's node recovers normal level, thus achieves, after power distribution network breaks down, power distribution network is carried out voltage-regulation Purpose.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to The accompanying drawing provided obtains other accompanying drawing.

Fig. 1 is a kind of distribution network voltage control method flow chart disclosed in the embodiment of the present invention；

Fig. 2 is a kind of distribution network voltage regulation system structure schematic diagram disclosed in the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

The embodiment of the invention discloses a kind of distribution network voltage control method, shown in Figure 1, the method includes:

Step S11: after power distribution network breaks down, calculates corresponding reactive power compensation on the spot amount.

Step S12: according to reactive power compensation on the spot amount, power distribution network is carried out reactive power compensation on the spot.

Step S13: after power distribution network reactive power compensation on the spot balances, then power distribution network is carried out inverse regulation voltage process, so that distribution In net, the node voltage of whole nodes recovers normal level.

In the embodiment of the present invention, distribution network voltage control method includes: after power distribution network breaks down, and calculates corresponding nothing Merit local compensation amount；According to reactive power compensation on the spot amount, power distribution network is carried out reactive power compensation on the spot；When power distribution network reactive power compensation on the spot After balance, then power distribution network is carried out inverse regulation voltage process, so that the node voltage of whole nodes recovers normal level in power distribution network.Can Seeing, the embodiment of the present invention is after power distribution network breaks down, and power distribution network is carried out by facility by calculated reactive power compensation on the spot amount Reactive power compensation on the spot, until after power distribution network reactive power compensation on the spot balances, just carrying out inverse regulation voltage process to power distribution network such that it is able to make In power distribution network, the node voltage of whole nodes recovers normal level, thus achieves and enters power distribution network after power distribution network breaks down The purpose of row voltage-regulation.

The embodiment of the invention discloses a kind of concrete distribution network voltage control method, relative to a upper embodiment, this reality Execute example and technical scheme has been made further instruction and optimization.Concrete:

Before upper embodiment step S11, also comprise determining that the reactive load degree of power distribution network.

In the embodiment of the present invention, the reactive load degree of power distribution network can be determined by following formula:

${\mathrm{\β}}_{A_i}=\underset{j=1}{\overset{n_l}{\mathrm{\Σ}}}{\mathrm{\ΔQ}}_{Rj}/\underset{j=1}{\overset{n_l}{\mathrm{\Σ}}}{\mathrm{\ΔQ}}_{Cj};$

In formula, A_iRepresent the subregion in power distribution network, n_lRepresent A_iThe number of lines in subregion, Δ Q_RjRepresent A_iJth in subregion The reactive power consumed in the reactance of bar circuit, Δ Q_CjRepresent A_iThe reactive power produced in the susceptance of j-th strip circuit in subregion,Size reflect the reactive load degree of circuit.

When the reactive load degree of power distribution network is more than the first predetermined threshold value, then calculate the computing formula of reactive power compensation on the spot amount For:

In formula, Δ Q_cRepresent reactive power compensation on the spot amount；Q_c,aimRepresent preferable reactive-load compensation amount；Round (*) represents four houses five Enter rounding function；Q₁Represent the idle amount that the feeder line headend node of power distribution network is injected to power distribution network；P₁Represent feeder line headend node note The active power entered；Represent ideal power factor；Q_cRepresent the reactive-load compensation amount put in power distribution network；Q_c,maxExpression is joined The higher limit of the reactive-load compensation amount that can put in electrical network.

It should be noted that when the reactive load degree of power distribution network is more than above-mentioned first predetermined threshold value, it is meant that now join The reactive load degree of electrical network is heavier, wherein, can be set, above-mentioned first predetermined threshold value at this according to artificial empirical value It is not specifically limited.

Accordingly, in the case of the reactive load degree of power distribution network is more than the first predetermined threshold value, mend on the spot according to idle The amount of repaying, carries out the process of reactive power compensation on the spot, specifically includes power distribution network: put into and reactive power compensation on the spot amount size to power distribution network Consistent idle capacitance.

It addition, in the present embodiment, idle amount Q that the feeder line headend node of power distribution network is injected to power distribution network₁Solution formula Including following object functionAnd object function

$\left\{\begin{array}{c}\min F_{A_i,1}=\underset{j=1}{\overset{n_G}{\mathrm{\Σ}}}\left|{\mathrm{\α}}_{G,j}\right|\\ \min F_{A_i,2}=P_{loss}\end{array}\right.$

Further, above-mentioned two object function need to meet following constraints:

Wherein, n_GFor subregion A_iThe number of interior PV type distributed power source；α_G,jFor subregion A_iInterior jth PV type distributed power source Idle degree of unbalancedness；P_lossFor subregion A_iInterior active power loss；P_G,iAnd Q_G,iIt is respectively subregion A_iInterior i-th electromotor node Gain merit and exert oneself with idle；P_D,iAnd Q_D,iIt is respectively subregion A_iMeritorious and the load or burden without work of interior i-th node；P_iAnd Q_iIt is respectively District A_iThe injection of interior i-th node is meritorious and idle；Q_cr,iFor subregion A_iThe reactive-load compensation amount amount of interior i-th candidate compensation buses； N_bFor system node number；Q_G,tFor subregion A_iInterior the t PV type distributed power source output is idle；WithQ _G It is respectively subregion A_iIn Idle maximum and the minima of exerting oneself of PV type distributed power source；WithQ _cr It is respectively subregion A_iThe idle benefit in interior distribution low-voltage side Repay cabinet and compensate maximum and the minima of electric capacity；V_G,tFor subregion A_iThe set end voltage of interior the t PV type distributed power source,WithV _G For subregion A_iThe extreme voltage maximum of interior PV type distributed power source and minima.

The present embodiment, can be to above-mentioned object function by utilizing above-mentioned constraintsAnd object functionAsk Solve, thus idle amount Q that the feeder line headend node obtaining power distribution network is injected to power distribution network₁Node voltage with feeder line headend node V₁。

Further, when the reactive load degree of power distribution network is less than or equal to the second predetermined threshold value, then calculate idle on the spot The computing formula of compensation dosage is:

In formula, Δ Q_cRepresent reactive power compensation on the spot amount；Q_c,aimRepresent preferable reactive-load compensation amount；Round (*) represents four houses five Enter rounding function；Q₁Represent the idle amount that the feeder line headend node of power distribution network is injected to power distribution network；P₁Represent feeder line headend node note The active power entered；Represent ideal power factor；Q_cRepresent the reactive-load compensation amount put in power distribution network；Q_c,minExpression is joined The lower limit of the reactive-load compensation amount that can put in electrical network.

It should be noted that when the reactive load degree of power distribution network is less than or equal to above-mentioned second predetermined threshold value, then mean The reactive load degree now power distribution network is lighter.In the present embodiment, threshold can be preset according to artificial empirical value to above-mentioned second Value is set, and wherein, above-mentioned first predetermined threshold value and above-mentioned second predetermined threshold value can be identical numerical value.

Accordingly, in the case of the reactive load degree of power distribution network is less than or equal to the second predetermined threshold value, according to idle Local compensation amount, carries out the process of reactive power compensation on the spot, specifically includes power distribution network: with reactive power compensation on the spot in excision power distribution network The idle capacitance that amount size is consistent.

Further, in upper embodiment step S12, power distribution network is carried out the process of inverse regulation voltage process, specifically includes: be right Power distribution network carries out Load flow calculation, then according to the node voltage of feeder line headend node after Load flow calculation, takes to regulate main shift Mode, power distribution network is carried out inverse regulation voltage process.

Wherein, after the above-mentioned process that power distribution network is carried out Load flow calculation, if the reactive load degree of power distribution network is more than 3rd predetermined threshold value, then calculate the required increment of adjustment of current main transformer no-load voltage ratio, then according to required increment of adjustment, to promote main transformer The voltage regulating mode of gear carries out boosting process to power distribution network；Wherein, the computing formula of required increment of adjustment is:

$\left\{\begin{array}{c}{k}_{aim}=min\{{\mathrm{\Δk}}_0\×round\left(\frac{V_1+{\mathrm{\ΔV}}_{lower}}{S_{Vk}\×{\mathrm{\Δk}}_0}\right),k_{max}\}\\ {\mathrm{\ΔV}}_{lower}=min\{{\mathrm{GV}}_{lower},V_{max}-V_1\}\\ \mathrm{\Δ}k=k_{aim}-k\end{array}\right.;$

In formula, k_aimRepresent current preferably main transformer no-load voltage ratio, Δ k₀Represent the unit extreme difference of main transformer no-load voltage ratio, round (*) table Show the rounding function that rounds up, V₁Representing the node voltage of the feeder line headend node of power distribution network, k represents the current of main transformer no-load voltage ratio Value, S_VkRepresent the node voltage V of feeder line headend node₁Sensitivity coefficient to the currency k of main transformer no-load voltage ratio, k_maxRepresent main transformer The higher limit of no-load voltage ratio, GV_lowerRepresent that all node interior joint voltages of current power distribution network surmount the maximum offset of lower voltage limit, Δ k represents required increment of adjustment.

It should be noted that after the above-mentioned process that power distribution network is carried out Load flow calculation, if the reactive load of power distribution network Degree is more than above-mentioned 3rd predetermined threshold value, then mean that the reactive load degree of current power distribution network is relatively heavy, wherein, and can basis Above-mentioned 3rd predetermined threshold value is set by artificial empirical value, does not specifically limit it at this.

It addition, after the above-mentioned process that power distribution network is carried out Load flow calculation, if the reactive load degree of power distribution network is less than Or equal to the 4th predetermined threshold value, then calculate the required regulation decrement of current main transformer no-load voltage ratio, then according to required regulation decrement, with fall The voltage regulating mode of low main shift carries out blood pressure lowering process to power distribution network；Wherein, the computing formula of required regulation decrement is:

$\left\{\begin{array}{c}{k}_{aim}=min\{{\mathrm{\Δk}}_0\×round\left(\frac{V_1-{\mathrm{\ΔV}}_{upper}}{S_{Vk}\×{\mathrm{\Δk}}_0}\right),k_{min}\}\\ {\mathrm{\ΔV}}_{upper}=\min \{{\mathrm{GV}}_{upper},V_1-V_{\min }\}\\ \mathrm{\Δ}k=k-k_{aim}\end{array}\right.;$

In formula, k_aimRepresent current preferably main transformer no-load voltage ratio, Δ k₀Represent the unit extreme difference of main transformer no-load voltage ratio, round (*) table Show the rounding function that rounds up, V₁Representing the node voltage of the feeder line headend node of power distribution network, k represents the current of main transformer no-load voltage ratio Value, S_VkRepresent the node voltage V of feeder line headend node₁Sensitivity coefficient to the currency k of main transformer no-load voltage ratio, k_minRepresent main transformer The lower limit of no-load voltage ratio, GV_upperRepresent that all node interior joint voltages of current power distribution network surmount the maximum offset of upper voltage limit, Δ k represents required regulation decrement.

It should be noted that after the above-mentioned process that power distribution network is carried out Load flow calculation, if the reactive load of power distribution network Degree is less than or equal to above-mentioned 4th predetermined threshold value, then mean that the reactive load degree of current power distribution network is relatively light, wherein, According to artificial empirical value, above-mentioned 4th predetermined threshold value can be set, it specifically not limited at this.

Accordingly, the embodiment of the invention also discloses a kind of distribution network voltage regulation system, shown in Figure 2, this system Including:

Compensation dosage computing module 21, for after power distribution network breaks down, calculates corresponding reactive power compensation on the spot amount；

Reactive power compensation on the spot equipment 22, for according to reactive power compensation on the spot amount, carries out reactive power compensation on the spot to power distribution network；

Inverse regulation voltage equipment 23, after balancing when power distribution network reactive power compensation on the spot, then carries out inverse regulation voltage process to power distribution network, So that the node voltage of whole nodes recovers normal level in power distribution network.

Specific works mistake about above-mentioned compensation dosage computing module 21, reactive power compensation on the spot equipment 22 and inverse regulation voltage equipment 23 Journey refers to the corresponding contents disclosed in previous embodiment, no longer repeats at this.

Visible, the embodiment of the present invention is after power distribution network breaks down, convenient by calculated reactive power compensation on the spot amount pair Power distribution network carries out reactive power compensation on the spot, until after power distribution network reactive power compensation on the spot balances, just power distribution network being carried out inverse regulation voltage process, It is thus possible to make the node voltage of whole nodes in power distribution network recover normal level, thus achieve after power distribution network breaks down Power distribution network is carried out the purpose of voltage-regulation.

Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like be used merely to by One entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operation Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant meaning Containing comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that A little key elements, but also include other key elements being not expressly set out, or also include for this process, method, article or The key element that equipment is intrinsic.In the case of there is no more restriction, statement " including ... " key element limited, do not arrange Except there is also other identical element in including the process of described key element, method, article or equipment.

Above a kind of distribution network voltage control method provided by the present invention and system are described in detail, herein Applying specific case to be set forth principle and the embodiment of the present invention, the explanation of above example is only intended to help Understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, The most all will change, in sum, this specification content should not be construed as this The restriction of invention.

Claims (10)

1. a distribution network voltage control method, it is characterised in that including:

After power distribution network breaks down, calculate corresponding reactive power compensation on the spot amount；

According to described reactive power compensation on the spot amount, described power distribution network is carried out reactive power compensation on the spot；

After described power distribution network reactive power compensation on the spot balances, then described power distribution network is carried out inverse regulation voltage process, so that described distribution In net, the node voltage of whole nodes recovers normal level.

Distribution network voltage control method the most according to claim 1, it is characterised in that the most idle just in described calculating Before ground compensation dosage, also comprise determining that the reactive load degree of described power distribution network.

Distribution network voltage control method the most according to claim 2, it is characterised in that when the reactive load of described power distribution network Degree is more than the first predetermined threshold value, then the computing formula calculating described reactive power compensation on the spot amount is:

In formula, Δ Q_cRepresent described reactive power compensation on the spot amount；Q_c,aimRepresent preferable reactive-load compensation amount；Round (*) represents four houses five Enter rounding function；Q₁Represent the idle amount that the feeder line headend node of described power distribution network is injected to described power distribution network；P₁Represent described feedback The active power that line headend node is injected；Represent ideal power factor；Q_cRepresent the idle benefit put in described power distribution network The amount of repaying；Q_c,maxRepresent the higher limit of the reactive-load compensation amount that can put in described power distribution network.

Distribution network voltage control method the most according to claim 3, it is characterised in that described idle mend on the spot according to described The amount of repaying, carries out the process of reactive power compensation on the spot to described power distribution network, including:

The idle capacitance consistent with described reactive power compensation on the spot amount size is put into described power distribution network.

Distribution network voltage control method the most according to claim 2, it is characterised in that when the reactive load of described power distribution network Degree is less than or equal to the second predetermined threshold value, then the computing formula calculating described reactive power compensation on the spot amount is:

In formula, Δ Q_cRepresent described reactive power compensation on the spot amount；Q_c,aimRepresent preferable reactive-load compensation amount；Round (*) represents four houses five Enter rounding function；Q₁Represent the idle amount that the feeder line headend node of described power distribution network is injected to described power distribution network；P₁Represent described feedback The active power that line headend node is injected；Represent ideal power factor；Q_cRepresent the idle benefit put in described power distribution network The amount of repaying；Q_c,minRepresent the lower limit of the reactive-load compensation amount that can put in described power distribution network.

Distribution network voltage control method the most according to claim 5, it is characterised in that described idle mend on the spot according to described The amount of repaying, carries out the process of reactive power compensation on the spot to described power distribution network, including:

Excise idle capacitance consistent with described reactive power compensation on the spot amount size in described power distribution network.

7. according to the distribution network voltage control method described in any one of claim 1 to 6, it is characterised in that described join described Electrical network carries out the process of inverse regulation voltage process, including:

Described power distribution network is carried out Load flow calculation, then according to the node voltage of feeder line headend node after Load flow calculation, takes to adjust The mode of joint main shift, carries out inverse regulation voltage process to described power distribution network.

Distribution network voltage control method the most according to claim 7, it is characterised in that

After described power distribution network is carried out Load flow calculation, if the reactive load degree of described power distribution network is more than the 3rd predetermined threshold value, Then calculate the required increment of adjustment of current main transformer no-load voltage ratio, then according to described required increment of adjustment, to promote the tune of main shift Pressure mode carries out boosting process to described power distribution network；Wherein, the computing formula of described required increment of adjustment is:

$\left\{\begin{array}{c}{k}_{aim}=min\{{\mathrm{\Δk}}_0\×round\left(\frac{V_1+{\mathrm{\ΔV}}_{lower}}{S_{Vk}\×{\mathrm{\Δk}}_0}\right),k_{max}\}\\ {\mathrm{\ΔV}}_{lower}=min\{{\mathrm{GV}}_{lower},V_{max}-V_1\}\\ \mathrm{\Δ}k=k_{aim}-k\end{array}\right.;$

In formula, k_aimRepresent current preferably main transformer no-load voltage ratio, Δ k₀Representing the unit extreme difference of main transformer no-load voltage ratio, round (*) represents four houses Five enter rounding function, V₁Representing the node voltage of the feeder line headend node of described power distribution network, k represents the currency of main transformer no-load voltage ratio, S_VkRepresent the node voltage V of described feeder line headend node₁Sensitivity coefficient to the currency k of described main transformer no-load voltage ratio, k_maxRepresent The higher limit of main transformer no-load voltage ratio, GV_lowerRepresent that all node interior joint voltages of presently described power distribution network surmount lower voltage limit Big side-play amount, Δ k represents described required increment of adjustment.

Distribution network voltage control method the most according to claim 7, it is characterised in that described power distribution network is being carried out trend After calculating, if the reactive load degree of described power distribution network is less than or equal to the 4th predetermined threshold value, then calculate current main transformer no-load voltage ratio Required regulation decrement, then according to described required regulation decrement, enters described power distribution network reducing the voltage regulating mode of main shift Row blood pressure lowering processes；Wherein, the computing formula of described required regulation decrement is:

$\left\{\begin{array}{c}{k}_{aim}=min\{{\mathrm{\Δk}}_0\×round\left(\frac{V_1-{\mathrm{\ΔV}}_{upper}}{S_{Vk}\×{\mathrm{\Δk}}_0}\right),k_{\min }\}\\ {\mathrm{\ΔV}}_{upper}=min\{{\mathrm{GV}}_{upper},V_1-V_{\min }\}\\ \mathrm{\Δ}k=k-k_{aim}\end{array}\right.;$

In formula, k_aimRepresent current preferably main transformer no-load voltage ratio, Δ k₀Representing the unit extreme difference of main transformer no-load voltage ratio, round (*) represents four houses Five enter rounding function, V₁Representing the node voltage of the feeder line headend node of described power distribution network, k represents the currency of main transformer no-load voltage ratio, S_VkRepresent the node voltage V of described feeder line headend node₁Sensitivity coefficient to the currency k of described main transformer no-load voltage ratio, k_minRepresent The lower limit of main transformer no-load voltage ratio, GV_upperRepresent that all node interior joint voltages of presently described power distribution network surmount upper voltage limit Big side-play amount, Δ k represents described required regulation decrement.

10. a distribution network voltage regulation system, it is characterised in that including:

Compensation dosage computing module, for after power distribution network breaks down, calculates corresponding reactive power compensation on the spot amount；

Reactive power compensation on the spot equipment, for according to described reactive power compensation on the spot amount, carries out reactive power compensation on the spot to described power distribution network；

Inverse regulation voltage equipment, after balancing when described power distribution network reactive power compensation on the spot, is then carried out at inverse regulation voltage described power distribution network Reason, so that the node voltage of whole nodes recovers normal level in described power distribution network.