CN103259267A - Mold splitting type voltage control method for wind power plant cluster - Google Patents

Abstract

The invention discloses a mold splitting type voltage control method for a wind power plant cluster, and belongs to the technical field of automatic voltage control of electrical power systems. According to the technical scheme, two control modes of a wind power plant are defined according to the voltage of a grid joint point and current reactive power regulation capacity of the wind power plant, and a wind power plant cluster control center under different control modes sends different control instructions to each wind power plant. The method carries out coordination control on other wind power plants in a cluster according to real-time sensitivity relations among the wind power plants of the wind power plant cluster when a certain wind power plant is insufficient in reactive power regulation capacity. The mold splitting type voltage control method for the wind power plant cluster can be integrated in a control system of the wind power plant cluster control center, and supplies supporting for voltage control of a regional power grid of the wind power plant cluster.

Description

A kind of merotype voltage control method for the wind energy turbine set cluster

Technical field

The invention belongs to electric power system automatism voltage control technical field, relate in particular to a kind of merotype voltage control method for the wind energy turbine set cluster.

Background technology

The reactive voltage problem of wind energy turbine set is one of key factor that influences wind energy turbine set operation and even power network safety operation.The rational and effective voltage control method could guarantee that the voltage of wind energy turbine set cluster is stable.At the wind-powered electricity generation initial stage of development, because wind energy turbine set quantity is few, capacity is less and be in the electrical network end, and the influence of its voltage problem often is confined to wind farm grid-connected point self, and is limited to the voltage influence of net side.But, along with the large-scale development of wind-powered electricity generation, the capacity of wind energy turbine set increase severely, it is more and more higher that the installed capacity of wind energy turbine set cluster accounts for the power system capacity ratio, if the voltage of wind energy turbine set cluster is not reasonably controlled, its voltage fluctuation will sharply worsen the voltage in some areas, idle situation.

At present, domestic electrical network all is to examine at technical indicator single wind energy turbine set and site (PCC) to the technical management standard of wind energy turbine set access.In wind energy turbine set reactive power research field, most research emphasis has all concentrated on the reactive Voltage Optimum control to single wind energy turbine set, considers that the research of the cooperation between close wind energy turbine set is less.

Wind energy turbine set cluster area voltage is stablized and the angle of operation of power networks economy from improving, and existing is unit with the wind energy turbine set, the mode of independent regulation is not optimum reactive power pattern separately.The control model of this dispersion can't be taken into account the pressure regulation requirement of area power grid, can not consider the coordination between adjacent wind energy turbine set, often causes irrational idle flowing, and therefore is necessary the wind energy turbine set cluster is made the as a whole voltage management that carries out.

Summary of the invention

Carry out the voltage management method at the present domestic electrical network of mentioning in the background technology at the wind energy turbine set cluster and can not consider coordination between adjacent wind energy turbine set, cause irrational idle mobile problem, the present invention proposes a kind of merotype voltage control method for the wind energy turbine set cluster.

A kind of merotype voltage control method for the wind energy turbine set cluster is characterized in that described method specifically may further comprise the steps:

Step 1: the real-time voltage V that obtains each wind farm grid-connected point _i, cluster control centre is with wind farm grid-connected some real-time voltage V _iThe voltage-target V that issues with the control centre _I-refCompare, establishing the admissible voltage fluctuation scope is V _DIf | V _i-V _I-ref|≤V _D, do not carry out the voltage adjustment; If | V _i-V _I-ref| V _D, then enter step 2;

Step 2: calculate the current idle variable capacity of each wind energy turbine set, if the idle variable capacity of the out-of-limit wind energy turbine set of voltage is non-vanishing, then enter local control model, i.e. step 3; If the idle variable capacity of the out-of-limit wind energy turbine set of voltage is zero, then enter the coordination control model, i.e. step 4;

Step 3: the out-of-limit wind energy turbine set i of calculating voltage is incorporated into the power networks the point voltage variation to the sensitivity that this wind farm grid-connected some reactive power changes, and asks for the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage, and according to the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage wind energy turbine set i is adjusted;

Step 4: calculate in the wind energy turbine set cluster zone all wind energy turbine set to voltage/idle sensitivity of the out-of-limit wind energy turbine set i of voltage, and determine to provide the wind energy turbine set j of idle support according to the level of sensitivity of wind energy turbine set; Calculating provides the idle adjustment amount of the wind energy turbine set j of idle support, and according to the idle adjustment amount that calculates the wind energy turbine set j that idle support is provided is adjusted.

In the described step 2, the formula that calculates the current idle variable capacity of each wind energy turbine set is:

Q _i-ava=Q _WTG+Q _s+Q _c

Wherein, Q _I-avaIdle variable capacity for wind energy turbine set; Q _WTGBe the idle variable capacity of wind-powered electricity generation unit in the wind energy turbine set; Q _sBe dynamic reactive equipment variable capacity; Q _cBe static reactive equipment variable capacity.

In the described step 3, the be incorporated into the power networks formula of the sensitivity that point voltage changes this wind farm grid-connected some reactive power of the out-of-limit wind energy turbine set i of calculating voltage is:

S=-(B'') ^-1V ^-1

Wherein: B'' is wind energy turbine set cluster zone admittance matrix, and matrix is reversible, has n node; V=diag (V ₁, V ₂..., V _n); Element S in the matrix S _IiFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that this wind farm grid-connected some reactive power changed.

In the described step 3, the formula of the idle adjustment amount of the out-of-limit wind energy turbine set i of calculating voltage is:

$\mathrm{\Δ}{Q}_i=\frac{\mathrm{\Δ}{V}_i}{S_{\mathrm{ii}}}=\frac{V_{i-\mathrm{ref}}-V_i}{S_{\mathrm{ii}}}$

Wherein, Δ Q _iBe the idle adjustment amount of wind energy turbine set i and site, Δ V _iBe the voltage deviation value of wind energy turbine set i and site, V _I-refBe the voltage-target of wind energy turbine set i and site, V _iBe the voltage actual value of wind energy turbine set i and site, S _IiFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set i and site reactive power are changed.

In the described step 3, according to the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage to the process that wind energy turbine set i adjusts be:

Step 501: judge the idle adjustment amount of the out-of-limit wind energy turbine set of the voltage Q that whether satisfies condition _I-min-Q _i≤ Δ Q _i≤ Q _I-max-Q _iWherein, Q _I-minBe the output reactive power minimum value of wind energy turbine set i, Q _iBe the current reactive power output valve of wind energy turbine set i, Q _I-maxIt is the output reactive power maximum of wind energy turbine set i; If satisfy, then by the idle adjustment amount of the out-of-limit wind energy turbine set of the voltage that calculates wind energy turbine set adjusted; Otherwise, execution in step 502;

Step 502: press $\mathrm{\&Delta;}{Q}_i=\left\{\begin{array}{cc}{Q}_{i-\min }-Q_i& \mathrm{\&Delta;}{Q}_i<Q_{i-\min }-Q_i\\ Q_{i-\max }-Q_i& \mathrm{\&Delta;}{Q}_i>Q_{i-\max }-Q_i\end{array}\right.$ Wind energy turbine set is adjusted; Wherein, Q _I-minBe the output reactive power minimum value of wind energy turbine set i, Q _iBe the current reactive power output valve of wind energy turbine set i, Q _I-maxIt is the output reactive power maximum of wind energy turbine set i.

In the described step 4, all wind energy turbine set to voltage/idle Sensitivity calculation formula of the out-of-limit wind energy turbine set i of voltage are in the calculating wind energy turbine set cluster zone:

S=-(B'') ^-1V ^-1

Wherein, B'' is wind energy turbine set cluster zone admittance matrix, and matrix is reversible, total n node; V=diag (V ₁, V ₂..., V _n); Element S in the matrix S _IjFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

In the described step 4, determine to provide the process of the wind energy turbine set j of idle support to be according to the level of sensitivity of wind energy turbine set;

Step 701: with the wind energy turbine set sensitivity that calculates by sorting from big to small;

Step 702: select sensitivity ordering wind energy turbine set j in front as the wind energy turbine set that idle support is provided.

In the described step 4, the formula that calculates the idle adjustment amount of the wind energy turbine set j that idle support is provided is:

$\mathrm{\&Delta;}{Q}_j=\frac{\mathrm{\&Delta;}{V}_i}{S_{\mathrm{ij}}}=\frac{V_{i-\mathrm{ref}}-V_i}{S_{\mathrm{ij}}}$

Wherein, Δ Q _jBe the idle adjustment amount of wind energy turbine set j and site, V _I-refBe the voltage-target of wind energy turbine set i and site, V _iBe the voltage actual value of wind energy turbine set i and site, Δ V _iBe the voltage deviation value of wind energy turbine set i and site, S _IjFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

In the described step 4, according to the idle adjustment amount that calculates to the process that the wind energy turbine set j that idle support is provided adjusts be:

Step 901: whether the idle adjustment amount of judging the wind energy turbine set that idle support is provided satisfies condition

Wherein, V _J-min, V _J-maxBe respectively the wind energy turbine set j point voltage that is incorporated into the power networks and allow minimum value and the maximum of range of operation, V _jBe the voltage actual value of wind energy turbine set j and site, S _JjFor the wind energy turbine set j point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed; If satisfy, then by the idle adjustment amount of the wind energy turbine set that idle support is provided that calculates wind energy turbine set j adjusted; Otherwise, execution in step 902;

Step 902: press $\mathrm{\&Delta;}{Q}_j=\left\{\begin{array}{cc}\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}& \mathrm{\&Delta;}{Q}_j<\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}\\ \frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}& \mathrm{\&Delta;}{Q}_j>\frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}\end{array}\right.$ J adjusts to wind energy turbine set, wherein, and V _J-min, V _J-maxBe respectively the wind energy turbine set j point voltage that is incorporated into the power networks and allow minimum value and the maximum of range of operation, V _jBe the voltage actual value of wind energy turbine set j and site, S _JjFor the wind energy turbine set j point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

The invention has the beneficial effects as follows, a kind of wind energy turbine set cluster voltage control method is proposed, the wind energy turbine set cluster is done as a whole managing, take full advantage of the idle regulating power of wind energy turbine set in the wind energy turbine set cluster, consider the cooperation between the wind energy turbine set, reach the purpose of the rate of qualified voltage that improves regional power grid.

Description of drawings

Fig. 1 is the flow chart of a kind of merotype voltage control method for the wind energy turbine set cluster provided by the invention.

Embodiment

Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.

Fig. 1 is the flow chart of a kind of merotype voltage control method for the wind energy turbine set cluster provided by the invention.Among Fig. 1, described method specifically may further comprise the steps:

Step 1: the real-time voltage V that obtains each wind farm grid-connected point _i, cluster control centre is with wind farm grid-connected some real-time voltage V _iThe voltage-target V that issues with the control centre _I-refCompare, establishing the admissible voltage fluctuation scope is V _DIf | V _i-V _I-ref|≤V _D, do not carry out the voltage adjustment; If | V _i-V _I-ref| V _D, then enter step 2;

Step 2: calculate the current idle variable capacity of each wind energy turbine set, if the idle variable capacity of the out-of-limit wind energy turbine set of voltage is non-vanishing, then enter local control model, i.e. step 3; If the idle variable capacity of the out-of-limit wind energy turbine set of voltage is zero, then enter the coordination control model, i.e. step 4;

In the step 2, the formula that calculates the current idle variable capacity of each wind energy turbine set is:

Q _i-ava=Q _WTG+Q _s+Q _c

Wherein, Q _I-avaIdle variable capacity for wind energy turbine set; Q _WTGBe the idle variable capacity of wind-powered electricity generation unit in the wind energy turbine set; Q _sBe dynamic reactive equipment variable capacity; Q _cBe static reactive equipment variable capacity.

Step 3: the out-of-limit wind farm grid-connected point voltage of calculating voltage changes the sensitivity that this wind farm grid-connected some reactive power changed, and asks for the idle adjustment amount of the out-of-limit wind energy turbine set of voltage, and according to the idle adjustment amount of the out-of-limit wind energy turbine set of voltage wind energy turbine set is adjusted;

Step 301: the out-of-limit wind energy turbine set i of the calculating voltage point voltage that is incorporated into the power networks changes the sensitivity that this wind farm grid-connected some reactive power changed:

S=-(B'') ^-1V ^-1

Wherein: B'' is wind energy turbine set cluster zone admittance matrix, and matrix is reversible, total n node; V=diag (V ₁, V ₂..., V _n); Element S in the matrix S _IiFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that this wind farm grid-connected some reactive power changed;

Step 302: the idle adjustment amount of the out-of-limit wind energy turbine set i of calculating voltage:

$\mathrm{\&Delta;}{Q}_i=\frac{\mathrm{\&Delta;}{V}_i}{S_{\mathrm{ii}}}=\frac{V_{i-\mathrm{ref}}-V_i}{S_{\mathrm{ii}}}---\left(1\right)$

Wherein, Δ Q _iBe the idle adjustment amount of wind energy turbine set i and site, Δ V _iBe the voltage deviation value of wind energy turbine set i and site, V _I-refBe the voltage-target of wind energy turbine set i and site, V _iBe the voltage actual value of wind energy turbine set i and site, S _IiFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set i and site reactive power are changed;

Step 303: the size according to the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage is adjusted wind energy turbine set i:

Consider the idle export-restriction of wind energy turbine set, namely export the idle variable capacity bound that reactive power can not exceed wind energy turbine set, so the span of the idle adjustment amount of the out-of-limit wind energy turbine set of voltage is:

Q _i-min-Q _i≤ΔQ _i≤Q _i-max-Q _i

Wherein, Q _I-minBe the output reactive power minimum value of wind energy turbine set i, Q _iBe the current reactive power output valve of wind energy turbine set i, Q _I-maxIt is the output reactive power maximum of wind energy turbine set i;

If the idle adjustment amount of the out-of-limit wind energy turbine set of the voltage that calculates exceeds idle variable capacity bound, then get boundary value by following formula:

$\mathrm{\&Delta;}{Q}_i=\left\{\begin{array}{cc}{Q}_{i-\min }-Q_i& \mathrm{\&Delta;}{Q}_i<Q_{i-\min }-Q_i\\ Q_{i-\max }-Q_i& \mathrm{\&Delta;}{Q}_i>Q_{i-\max }-Q_i\end{array}\right.$

Wherein, Q _I-minBe the output reactive power minimum value of wind energy turbine set i, Q _iBe the current reactive power output valve of wind energy turbine set i, Q _I-maxIt is the output reactive power maximum of wind energy turbine set i.

Step 4: calculate in the wind energy turbine set cluster zone all wind energy turbine set to voltage/idle sensitivity of the out-of-limit wind energy turbine set i of voltage, and determine to provide the wind energy turbine set j of idle support according to the level of sensitivity of wind energy turbine set; Calculating provides the idle adjustment amount of the wind energy turbine set j of idle support; And according to the idle adjustment amount that calculates the wind energy turbine set j that idle support is provided is adjusted;

Step 401: calculate voltage/idle sensitivity in the wind energy turbine set cluster zone.

S=-(B'') ^-1V ^-1

Wherein, B'' is wind energy turbine set cluster zone admittance matrix, and matrix is reversible, total n node; V=diag (V ₁, V ₂..., V _n); Element S in the matrix S _IjFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed;

Step 402: by sorting from big to small, preferentially select sensitivity ordering wind energy turbine set in front as the wind energy turbine set that idle support is provided the wind energy turbine set sensitivity that calculates;

Step 403: the idle adjustment amount that calculates the wind energy turbine set j that idle support is provided:

$\mathrm{\&Delta;}{Q}_j=\frac{\mathrm{\&Delta;}{V}_i}{S_{\mathrm{ij}}}=\frac{V_{i-\mathrm{ref}}-V_i}{S_{\mathrm{ij}}}$

Wherein, Δ Q _jBe the idle adjustment amount of wind energy turbine set j and site, V _I-refBe the voltage-target of wind energy turbine set i and site, V _iBe the voltage actual value of wind energy turbine set i and site, Δ V _iBe the voltage deviation value of wind energy turbine set i and site, S _IjFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

For making wind energy turbine set j and site not because idle adjustment causes that voltage is out-of-limit, guarantee that wind energy turbine set j is incorporated into the power networks point voltage in allowed band, so provide the span of the wind energy turbine set j of idle support to be:

$\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}<\mathrm{\&Delta;}{Q}_j<\frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}$

Wherein, V _J-min, V _J-maxBe respectively the wind energy turbine set j point voltage that is incorporated into the power networks and allow minimum value and the maximum of range of operation, V _jBe the voltage actual value of wind energy turbine set j and site, S _JjFor the wind energy turbine set j point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed;

Exceed allowed band if calculate the idle adjustment amount in wind energy turbine set j and site, then get boundary value by following formula:

$\mathrm{\&Delta;}{Q}_j=\left\{\begin{array}{cc}\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}& \mathrm{\&Delta;}{Q}_j<\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}\\ \frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}& \mathrm{\&Delta;}{Q}_j>\frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}\end{array}\right.$

Wherein, V _J-min, V _J-maxBe respectively the wind energy turbine set j point voltage that is incorporated into the power networks and allow minimum value and the maximum of range of operation, V _jBe the voltage actual value of wind energy turbine set j and site, S _JjFor the wind energy turbine set j point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed;

Step 404: the wind energy turbine set j that idle support is provided is adjusted according to the idle adjustment amount that step 403 calculates.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (9)

1. merotype voltage control method that is used for the wind energy turbine set cluster is characterized in that described method specifically may further comprise the steps:

Step 1: the real-time voltage V that obtains each wind farm grid-connected point _i, cluster control centre is with wind farm grid-connected some real-time voltage V _iThe voltage-target V that issues with the control centre _I-refCompare, establishing the admissible voltage fluctuation scope is V _DIf | V _i-V _I-ref|≤V _D, do not carry out the voltage adjustment; If | V _i-V _I-ref| V _D, then enter step 2;

Step 2: calculate the current idle variable capacity of each wind energy turbine set, if the idle variable capacity of the out-of-limit wind energy turbine set of voltage is non-vanishing, then enter local control model, i.e. step 3; If the idle variable capacity of the out-of-limit wind energy turbine set of voltage is zero, then enter the coordination control model, i.e. step 4;

Step 3: the out-of-limit wind energy turbine set i of calculating voltage is incorporated into the power networks point voltage to the sensitivity of this wind energy turbine set output reactive power, asks for the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage, and according to the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage wind energy turbine set i is adjusted;

Step 4: calculate in the wind energy turbine set cluster zone all wind energy turbine set to voltage/idle sensitivity of the out-of-limit wind energy turbine set i of voltage, and determine to provide the wind energy turbine set j of idle support according to the level of sensitivity of wind energy turbine set; Calculating provides the idle adjustment amount of the wind energy turbine set j of idle support, and according to the idle adjustment amount that calculates the wind energy turbine set j that idle support is provided is adjusted.

2. method according to claim 1 is characterized in that, the formula of the current idle variable capacity of each wind energy turbine set of described calculating is:

Q _i-ava=Q _WTG+Q _s+Q _c

Wherein, Q _I-avaIdle variable capacity for wind energy turbine set; Q _WTGBe the idle variable capacity of wind-powered electricity generation unit in the wind energy turbine set; Q _sBe dynamic reactive equipment variable capacity; Q _cBe static reactive equipment variable capacity.

3. method according to claim 1 is characterized in that, the out-of-limit wind energy turbine set i of the described calculating voltage formula that point voltage changes the sensitivity that this wind farm grid-connected some reactive power changed that is incorporated into the power networks is:

S=-(B'') ^-1V ^-1

Wherein: B'' is wind energy turbine set cluster zone admittance matrix, and matrix is reversible, total n node; V=diag (V ₁, V ₂..., V _n); Element S in the matrix S _IiFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that this wind farm grid-connected some reactive power changed.

4. method according to claim 1 is characterized in that, the formula of the idle adjustment amount of the out-of-limit wind energy turbine set i of described calculating voltage is:

$\mathrm{\&Delta;}{Q}_i=\frac{\mathrm{\&Delta;}{V}_i}{S_{\mathrm{ii}}}=\frac{V_{i-\mathrm{ref}}-V_i}{S_{\mathrm{ii}}}$

Wherein, Δ Q _iBe the idle adjustment amount of wind energy turbine set i and site, Δ V _iBe the voltage deviation value of wind energy turbine set i and site, V _I-refBe the voltage-target of wind energy turbine set i and site, V _iBe the voltage actual value of wind energy turbine set i and site, S _IiFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set i and site reactive power are changed.

5. method according to claim 1 is characterized in that, described size according to the idle adjustment amount of the out-of-limit wind energy turbine set i of voltage to the process that wind energy turbine set i adjusts is:

Step 501: the size of judging the idle adjustment amount of the out-of-limit wind energy turbine set of the voltage Q that whether satisfies condition _I-min-Q _i≤ Δ Q _i≤ Q _I-max-Q _iWherein, Q _I-minBe the output reactive power minimum value of wind energy turbine set i, Q _iBe the current reactive power output valve of wind energy turbine set i, Q _I-maxIt is the output reactive power maximum of wind energy turbine set i; If satisfy, then by the idle adjustment amount of the out-of-limit wind energy turbine set of the voltage that calculates wind energy turbine set adjusted; Otherwise, execution in step 502;

Step 502: press $\mathrm{\&Delta;}{Q}_i=\left\{\begin{array}{cc}{Q}_{i-\min }-Q_i& \mathrm{\&Delta;}{Q}_i<Q_{i-\min }-Q_i\\ Q_{i-\max }-Q_i& \mathrm{\&Delta;}{Q}_i>Q_{i-\max }-Q_i\end{array}\right.$ Wind energy turbine set is adjusted; Wherein, Q _I-minBe the output reactive power minimum value of wind energy turbine set i, Q _iBe the current reactive power output valve of wind energy turbine set i, Q _I-maxIt is the output reactive power maximum of wind energy turbine set i.

6. method according to claim 1 is characterized in that, all wind energy turbine set to voltage/idle Sensitivity calculation formula of the out-of-limit wind energy turbine set i of voltage are in the described calculating wind energy turbine set cluster zone:

S=-(B'') ^-1V ^-1

Wherein, B'' is wind energy turbine set cluster zone admittance matrix, and matrix is reversible, total n node; V=diag (V ₁, V ₂..., V _n); Element S in the matrix S _IjFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

7. method according to claim 1 is characterized in that, described level of sensitivity according to wind energy turbine set determines to provide the process of the wind energy turbine set j of idle support to be;

Step 701: with the wind energy turbine set sensitivity that calculates by sorting from big to small;

Step 702: select sensitivity ordering wind energy turbine set j in front as the wind energy turbine set that idle support is provided.

8. method according to claim 1 is characterized in that, described calculating provides the formula of idle adjustment amount of the wind energy turbine set j of idle support to be:

$\mathrm{\&Delta;}{Q}_j=\frac{\mathrm{\&Delta;}{V}_i}{S_{\mathrm{ij}}}=\frac{V_{i-\mathrm{ref}}-V_i}{S_{\mathrm{ij}}}$

Wherein, Δ Q _jBe the idle adjustment amount of wind energy turbine set j and site, V _I-refBe the voltage-target of wind energy turbine set i and site, V _iBe the voltage actual value of wind energy turbine set i and site, Δ V _iBe the voltage deviation value of wind energy turbine set i and site, S _IjFor the wind energy turbine set i point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

9. method according to claim 1 is characterized in that, in the described step 4, according to the idle adjustment amount that calculates to the process that the wind energy turbine set j that idle support is provided adjusts is:

Step 901: whether the size of judging the idle adjustment amount of the wind energy turbine set that idle support is provided satisfies condition

Wherein, V _J-min, V _J-maxBe respectively the wind energy turbine set j point voltage that is incorporated into the power networks and allow minimum value and the maximum of range of operation, V _jBe the voltage actual value of wind energy turbine set j and site, S _JjFor the wind energy turbine set j point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed; If satisfy, then by the idle adjustment amount of the wind energy turbine set that idle support is provided that calculates wind energy turbine set j adjusted; Otherwise, execution in step 902;

Step 902: press $\mathrm{\&Delta;}{Q}_j=\left\{\begin{array}{cc}\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}& \mathrm{\&Delta;}{Q}_j<\frac{V_{j-\min }-V_j}{S_{\mathrm{jj}}}\\ \frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}& \mathrm{\&Delta;}{Q}_j>\frac{V_{j-\max }-V_j}{S_{\mathrm{jj}}}\end{array}\right.$ J adjusts to wind energy turbine set, wherein, and V _J-min, V _J-maxBe respectively the wind energy turbine set j point voltage that is incorporated into the power networks and allow minimum value and the maximum of range of operation, V _jBe the voltage actual value of wind energy turbine set j and site, S _JjFor the wind energy turbine set j point voltage that is incorporated into the power networks changes the sensitivity that wind energy turbine set j and site reactive power are changed.

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