CN105846447A - Multi-loop DC inverter station dynamic reactive power compensation configuration priority determination method - Google Patents

Abstract

The invention relates to a multi-loop DC inverter station dynamic reactive power compensation configuration priority determination method. The method comprises the following steps: calculating multi-infeed effective short circuit ratio MIESCR of AC buses of n-loop DC inverter stations respectively for n-loop DC power transmission system inverter stations fed in a receiving end AC grid; for any one inverter station l (l=1,...,n), calculating multi-infeed effective short circuit ratio increment delta MIESCR of the AC buses of the n-loop DC inverter stations with the function of dynamic reactive power compensation equipment being taken into consideration, and corrected multi-infeed effective short circuit ratio MIESCRrev after the inverter stations are equipped with the dynamic reactive power compensation equipment; and determining comprehensive index SMIESCR (l), ranking the comprehensive index SMIESCR (l), and determining the final configuration priority according to the ranking result. The method improves accuracy of the determined multi-loop DC inverter station dynamic reactive power compensation configuration priority, and can improve effect of determining the multi-loop DC inverter station dynamic reactive power compensation configuration priority based on the sequence above.

Description

The determination method of multiple-circuit line Inverter Station dynamic passive compensation configuration preference order

Technical field

The present invention relates to technical field of electric power, particularly relate to a kind of multiple-circuit line Inverter Station dynamic passive compensation The determination method of configuration preference order.

Background technology

Along with the fast development of China's economy, the electric power of the load center such as Yangtze River Delta, the Delta of the Pearl River needs Asking and continue to increase, transferring electricity from the west to the east transmission of electricity scale increases year by year.Compared to high-voltage AC transmission, high-voltage dc transmission Electricity is with the obvious advantage in terms of Technological Economy, thus is particularly well-suited to remote, Large Copacity transferring electricity from the west to the east transmission of electricity work Journey.In recent years, increasing DC transmission system Inverter Station drop point in same receiving end AC network, due to Load center AC network electrical link is tight, and receiving-end system presents typical multiple-circuit line system and concentrates feedback The grid structure feature entered, influences each other between multiple-circuit line system Inverter Station, receiving end AC network and direct current Influence each other between system etc. and to highlight, need in Power System Planning, to carry out critical-path analysis and propose reply arranging Execute.

It is that multiple-circuit line system Inverter Station is changed simultaneously at the above-mentioned aspect that influences each other, the most one of distinct issues Failure fault and recovery process thereof need to draw a large amount of dynamic reactive power simultaneously mutually, are limited to DC inversion station The dynamic reactive enabling capabilities of the reactive-load compensation equipment such as alternating current filter and capacitor is limited, Inverter Station exchange mother Line voltage recovers difficulty after a failure, easily occurs Voltage Instability to cause large area blackout.

Inverter Station configuration dynamic reactive compensation device can provide perceptual idle merit in fault and recovery process thereof Rate, supports Inverter Station ac bus voltage and recovers in time after commutation failure fault, beneficially voltage stabilization. Owing to dynamic reactive compensation device is expensive and increases Inverter Station floor space, in the institute of multiple-circuit line system There is Inverter Station configuration dynamic reactive compensation device economy poor, it is therefore desirable to research multiple-circuit line Inverter Station is moved The problem of state reactive-load compensation configuration preference order definite sequence really, i.e. by quantifying each Inverter Station of index analysis Allocative effect, the order being determined by configures dynamic reactive compensation device in a limited number of Inverter Station, maximum The raising multiple-circuit line system Inverter Station ac bus Voltage Stability Level of limit.

At present, traditional multiple-circuit line Inverter Station dynamic passive compensation configuration preference order definite sequence really is general Being determined by the contrast of computer time-domain-simulation, the workload of the method is relatively big and there is certain exploration blindly Property, easily affect the effect that multiple-circuit line Inverter Station dynamic passive compensation configuration preference order determines.

Summary of the invention

Based on this, it is necessary to easily affect the configuration of multiple-circuit line Inverter Station dynamic passive compensation for traditional scheme Order of priority determines the technical problem of effect, it is provided that a kind of multiple-circuit line Inverter Station dynamic passive compensation configuration is excellent The determination method of first order.

A kind of determination method of multiple-circuit line Inverter Station dynamic passive compensation configuration preference order, including walking as follows Rapid:

N for feed-in receiving end AC network returns DC transmission system Inverter Station, calculates n and goes back to DC inversion station Effective short-circuit ratio MIESCR of the many direct currents of ac bus；Wherein, n is positive integer；

For n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate Inverter Station configure dynamic passive compensation The n produced after device returns the many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR；

For n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate Inverter Station configure dynamic passive compensation After device, to return the many direct currents of correction of DC inversion station ac bus and dynamic reactive compensation device effect the shortest for n MIESCR is compared on road_rev；

For n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate Inverter Station configure dynamic passive compensation After device, n returns DC inversion station ac bus correction effective short-circuit ratio MIESCR of many direct currents_rev,i(i=1,2 ..., n) Sum, forms aggregative indicator SMIESCR (l) of Inverter Station l configuration dynamic reactive compensation device effect；

For aggregative indicator SMIESCR (l) (l=1,2 ..., n) sort from big to small, according to sequence knot Fruit determines final configuration preference order sequence.

The determination method of above-mentioned multiple-circuit line Inverter Station dynamic passive compensation configuration preference order, is subject to for feed-in The n of end AC network returns DC transmission system Inverter Station, and calculating n respectively, to return DC inversion station ac bus many Effective short-circuit ratio MIESCR of direct current, the many direct currents of ac bus effective short-circuit ratio increments Δ MIESCR, exchange Correction effective short-circuit ratio MIESCR of many direct currents of bus meter and dynamic reactive compensation device effect_rev, and then determine Aggregative indicator SMIESCR (l), is ranked up above-mentioned aggregative indicator SMIESCR (l), at the knot according to sequence Fruit determines the sequence of final configuration preference order, improve determined by multiple-circuit line Inverter Station dynamic reactive mend Repay the accuracy of configuration preference order order, and then can improve and carry out multiple-circuit line inversion according to said sequence The effect that dynamic passive compensation configuration preference order of standing determines.

Accompanying drawing explanation

Fig. 1 is the determination side of the multiple-circuit line Inverter Station dynamic passive compensation configuration preference order of an embodiment Method flow chart；

Fig. 2 is the Inverter Station electric network composition schematic diagram of an embodiment.

Detailed description of the invention

Below in conjunction with the accompanying drawings to the multiple-circuit line Inverter Station dynamic passive compensation configuration preference order of the present invention really The detailed description of the invention determining method is described in detail.

The multiple-circuit line Inverter Station dynamic passive compensation configuration preference of an embodiment it is shown with reference to Fig. 1, Fig. 1 The determination method flow diagram of order, comprises the steps:

S10, the n for feed-in receiving end AC network return DC transmission system Inverter Station, and it is inverse that calculating n returns direct current Become station ac bus effective short-circuit ratio MIESCR of many direct currents；Wherein, n is positive integer；

Effective short-circuit ratio MIESCR of the many direct currents of above-mentioned ac bus includes i-th time DC inversion station ac bus MIESCR_i(i=1,2 ..., n).

In one embodiment, the above-mentioned n for feed-in receiving end AC network returns DC transmission system Inverter Station, Calculating n returns the process of DC inversion station ac bus effective short-circuit ratio MIESCR of many direct currents and includes:

A () comprises all n according to the foundation of perunit value parameter and returns the joint of straight-flow system Inverter Station ac bus node Point admittance matrix Y:

Y=[Y_ij]_n×n,

In formula, Y matrix dimension is n n, and wherein the i-th row, the i-th column element are the self-admittance of node i, i-th Row, jth column element are the transadmittance between node i and node j, 1≤i≤j≤n；

B () passes through Y matrix inversion operation, calculating comprises all n and returns straight-flow system Inverter Station ac bus joint The nodal impedance matrix Z of point:

Z=[Z_ij]_n×n=Y^-1,

In formula, Z matrix dimension is n n, and wherein the i-th row, the i-th column element are the self-impedance of node i, i-th Row, jth column element are the mutual impedance between node i and node j, 1≤i≤j≤n；

C () calculates all n and returns many direct currents effective short-circuit ratio index MIESCR of DC inversion station ac bus, Wherein i-th time DC inversion station ac bus MIESCR_i(i=1,2 ..., n) computational methods include:

${\mathrm{MIESCR}}_i=\frac{1}{\underset{k=1}{\overset{n}{\Σ}}{z}_{ik}{P}_{dcn0,k}},$

Z in formula_ikFor Z matrix the i-th row, kth column element Z_ikCorresponding modulus value, P_dcn0,kDirect current is returned for kth Transmission system specified active power perunit value.

S20, for n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate Inverter Station configure dynamic reactive The n produced after compensation device returns the many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR；Wherein, l is the positive integer more than or equal to 1 and less than or equal to n, and i is more than or equal to 1 and to be less than Positive integer equal to n；

In above-mentioned steps S20, first obtain the specified active power perunit value of multiple-circuit line Inverter Station, above-mentioned volume Determining active power perunit value can be by reading the related description document of electrical equipment in corresponding multiple-circuit line Inverter Station Acquired.Above-mentioned n returns the many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR and includes The i-th time many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR_i(i=1,2 ..., n).

In one embodiment, above-mentioned for n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate at this The n produced after Inverter Station configuration dynamic reactive compensation device returns the Inverter Station ac bus effective short-circuit ratio of many direct currents The step of increments Δ MIESCR includes:

Calculate the i-th time many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR_i (i=1,2 ..., n), wherein Δ MIESCR_iComputational methods include:

${\mathrm{\ΔMIESCR}}_i=\frac{z_{il}{S}_{stat}}{\underset{k=1}{\overset{n}{\Σ}}{z}_{ik}{P}_{dcn0,k}},$

Z in formula_ilFor Z matrix the i-th row, l column element Z_ilCorresponding modulus value, S_statFor known dynamic reactive Compensation equipment rated capacity perunit value.

S30, for n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate this Inverter Station configure dynamic nothing After Reactive power compensation installations, all n return DC inversion station ac bus meter and the correction of dynamic reactive compensation device effect Effective short-circuit ratio MIESCR of many direct currents_rev；Wherein, effective short-circuit ratio MIESCR of the many direct currents of described correction_revBag The many direct-current short circuit of correction including i-th time DC inversion station ac bus compare MIESCR_rev,i(i=1,2 ..., n)；

In one embodiment, above-mentioned for n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate inverse After becoming station configuration dynamic reactive compensation device, n returns the DC inversion station ac bus correction effective short-circuit ratio of many direct currents MIESCR_rev,iStep include:

The many direct-current short circuit of correction calculating i-th time DC inversion station ac bus compare MIESCR_rev,i (i=1,2 ..., n), wherein said MIESCR_rev,iComputational methods include:

MIESCR_rev,i=MIESCR_i+ΔMIESCR_i。

S40, for n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate Inverter Station configure dynamic reactive After compensation device, n returns DC inversion station ac bus correction effective short-circuit ratio MIESCR of many direct currents_rev,i (i=1,2 ..., n) sum, form the aggregative indicator of Inverter Station l configuration dynamic reactive compensation device effect SMIESCR(l)；

In one embodiment, above-mentioned for n return arbitrary Inverter Station l of direct current (l=1,2 ..., n), calculate at this After Inverter Station configuration dynamic reactive compensation device, to return the DC inversion station many direct currents of ac bus correction the most short-circuit for n Compare MIESCR_rev,i(i=1,2 ..., n) sum, form combining of Inverter Station l configuration dynamic reactive compensation device effect The step closing index S MIESCR (l) includes:

$SMIESCR\left(l\right)=\underset{i=1}{\overset{n}{\Σ}}{\mathrm{MIESCR}}_{rev,i}.$

S50, for aggregative indicator SMIESCR (l) (l=1,2 ..., n) sort from big to small, according to sequence Result determine the sequence of final configuration preference order.

The determination method of the multiple-circuit line Inverter Station dynamic passive compensation configuration preference order that the present invention provides is right Return DC transmission system Inverter Station in the n of feed-in receiving end AC network, calculate n respectively and return the friendship of DC inversion station Stream bus effective short-circuit ratio MIESCR of many direct currents, the many direct currents of ac bus effective short-circuit ratio increments Δ The correction effective short-circuit ratio of many direct currents of MIESCR, ac bus and dynamic reactive compensation device effect MIESCR_rev, and then determine aggregative indicator SMIESCR (l), above-mentioned aggregative indicator SMIESCR (l) is arranged Sequence, is determining the sequence of final configuration preference order according to the result of sequence, improve determined by many Hui Zhi The accuracy of stream Inverter Station dynamic passive compensation configuration preference order order, and then can improve according to above-mentioned suitable Sequence carries out the effect that multiple-circuit line Inverter Station dynamic passive compensation configuration preference order determines.

In one embodiment, having the configuration of power network corresponding to multiple-circuit line system Inverter Station can be such as Fig. 2 Shown in.

The basic perunit value ginseng of known each time straight-flow system in many times (3 times) straight-flow system Inverter Station shown in Fig. 2 Number includes: the specified active power perunit value of DC transmission system: P_dcn0,1=P_dcn0,2=P_dcn0,3=1；Each impedance Value is respectively as follows: Z₁∠θ₁=0.5 ∠ 90 °, Z₂∠θ₂=0.8 ∠ 90 °, Z₃∠θ₃=0.3 ∠ 90 °, Z₁₂∠θ₁₂=1.0 ∠ 90 °, Z₁₃∠θ₁₃=0.8 ∠ 90 °, Z₂₃∠θ₂₃=0.5 ∠ 90 °；Each Inverter Station (multiple-circuit line system Inverter Station) alternating current filter Susceptance value constant with capacitor: B_c1=j0.5, B_c2=j0.55, B_c3=j0.6.Known dynamic reactive compensation device Rated capacity perunit value S_stat=0.5.

By power system ultimate principle and known perunit value parameter, set up and comprise all 3 times straight-flow system inversions Stand the bus admittance matrix Y of ac bus node:

$Y=j\left[\begin{array}{ccc}-3.75& 1& 1.25\\ 1& -3.7& 2\\ 1.25& 2& -5.98\end{array}\right]$

To above-mentioned Y matrix inversion operation, calculate the joint comprising 3 times straight-flow system Inverter Station ac bus nodes Point impedance matrix Z:

$Z=Y^{-1}=j\left[\begin{array}{ccc}0.3539& 0.1656& 0.1294\\ 0.1656& 0.4074& 0.1709\\ 0.1294& 0.1709& 0.2514\end{array}\right]$

Calculate many direct currents effective short-circuit ratio index (effective short-circuit ratio parameter) of all 3 times straight-flow systems MIESCR, effective short-circuit ratio index MIESCR that wherein i-th time straight-flow system is corresponding_i(i=1,2,3) meter Calculation formula is:

${\mathrm{MIESCR}}_i=\frac{1}{\underset{k=1}{\overset{3}{\Σ}}{z}_{ik}{P}_{dcn0,k}}$

Z in formula_ikFor Z matrix the i-th row, kth column element Z_ikCorresponding modulus value, P_dcn0,kStraight-flow system is returned for kth The specified active power perunit value of transmission system.Wherein:

${\mathrm{MIESCR}}_1=\frac{1}{\underset{k=1}{\overset{3}{\Σ}}{z}_{1k}{P}_{dcn0,k}}=\frac{1}{0.3539\×1+0.1656\×1+0.1294\×1}=1.5411,$

${\mathrm{MIESCR}}_2=\frac{1}{\underset{k=1}{\overset{3}{\Σ}}{z}_{2k}{P}_{dcn0,k}}=\frac{1}{0.1656\×1+0.4074\×1+0.1709\×1}=1.3443,$

${\mathrm{MIESCR}}_3=\frac{1}{\underset{k=1}{\overset{3}{\Σ}}{z}_{3k}{P}_{dcn0,k}}=\frac{1}{0.1294\×1+0.1709\×1+0.2514\×1}=1.8126,$

Dynamic passive compensation configuration is carried out successively for each Inverter Station l (l=1,2,3), calculates and join in each Inverter Station The all 3 times Inverter Station ac bus effective short-circuit ratioes of many direct currents produced after putting dynamic reactive compensation device increase Amount Δ MIESCR, the Inverter Station ac bus effective short-circuit ratio of many direct currents that wherein i-th time straight-flow system is corresponding increases Dosage Δ MIESCR_i(i=1,2,3) computational methods include:

${\mathrm{\ΔMIESCR}}_i=\frac{z_{il}{S}_{stat}}{\underset{k=1}{\overset{n}{\Σ}}{z}_{ik}{P}_{dcn0,k}},$

Z in formula_ilFor Z matrix the i-th row, l column element Z_ilCorresponding modulus value, S_statFor known dynamic reactive Compensation equipment rated capacity perunit value.

If dynamic reactive compensation device is configured at Inverter Station 1 (l=1), then the Inverter Station that 3 times straight-flow systems are corresponding Ac bus Δ MIESCR_i(i=1,2,3):

${\mathrm{\ΔMIESCR}}_1=\frac{z_{11}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{1k}{P}_{dcn0,k}}=\frac{0.3539\×0.5}{0.3539\×1+0.1656\×1+0.1294\×1}=0.2727;$

${\mathrm{\ΔMIESCR}}_2=\frac{z_{21}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{2k}{P}_{dcn0,k}}=\frac{0.1656\×0.5}{0.1656\×1+0.4074\×1+0.1709\×1}=0.1113;$

${\mathrm{\ΔMIESCR}}_3=\frac{z_{31}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{3k}{P}_{dcn0,k}}=\frac{0.1294\×0.5}{0.1294\×1+0.1709\×1+0.2514\×1}=0.1173;$

If dynamic reactive compensation device is configured at Inverter Station 2 (l=2), then the DC inversion station that 3 times systems are corresponding Ac bus Δ MIESCR_i(i=1,2,3):

${\mathrm{\ΔMIESCR}}_1=\frac{z_{12}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{1k}{P}_{dcn0,k}}=\frac{0.1656\×0.5}{0.3539\×1+0.1656\×1+0.1294\×1}=0.1276;$

${\mathrm{\ΔEMIESCR}}_2=\frac{z_{22}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{2k}{P}_{dcn0,k}}=\frac{0.4074\×0.5}{0.1656\×1+0.4074\×1+0.1709\×1}=0.2738;$

${\mathrm{\ΔMIESCR}}_3=\frac{z_{32}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{3k}{P}_{dcn0,k}}=\frac{0.1709\×0.5}{0.1294\×1+0.1709\×1+0.2514\×1}=0.1549;$

If dynamic reactive compensation device is configured at Inverter Station 3 (l=3), then the DC inversion station that 3 times systems are corresponding Ac bus Δ MIESCR_i(i=1,2,3):

${\mathrm{\ΔMIESCR}}_1=\frac{z_{13}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{1k}{P}_{dcn0,k}}=\frac{0.1294\×0.5}{0.3539\×1+0.1656\×1+0.1294\×1}=0.0997;$

${\mathrm{\ΔMIESCR}}_2=\frac{z_{23}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{2k}{P}_{dcn0,k}}=\frac{0.1709\×0.5}{0.1656\×1+0.4074\×1+0.1709\×1}=0.1149;$

${\mathrm{\ΔMIESCR}}_3=\frac{z_{33}{S}_{stat}}{\underset{k=1}{\overset{3}{\Σ}}{z}_{3k}{P}_{dcn0,k}}=\frac{0.2514\×0.5}{0.1294\×1+0.1709\×1+0.2514\×1}=0.2278;$

Summary result of calculation, the Inverter Station ac bus Δ MIESCR such as table 1 that 3 times straight-flow systems are corresponding Shown in.

The Inverter Station ac bus Δ MIESCR that 13 times straight-flow systems of table are corresponding

For arbitrary Inverter Station l (l=1,2,3), calculate after this Inverter Station configuration dynamic reactive compensation device all 3 times DC inversion station ac bus meters and the effective short circuit revising many direct currents of dynamic reactive compensation device effect Compare MIESCR_rev, wherein correction many direct-current short circuit ratio of the Inverter Station ac bus that i-th time straight-flow system is corresponding MIESCR_rev,i(i=1,2,3) computational methods include:

MIESCR_rev,i=MIESCR_i+ΔMIESCR_i,

If dynamic reactive compensation device is configured at Inverter Station 1 (l=1), then the Inverter Station that 3 times straight-flow systems are corresponding Ac bus MIESCR_rev,i(i=1,2,3):

MIESCR_rev,1=MIESCR₁+ΔMIESCR₁=1.5411+0.2727=1.8138,

MIESCR_rev,2=MIESCR₂+ΔMIESCR₂=1.3443+0.1113=1.4556,

MIESCR_rev,3=MIESCR₃+ΔMIESCR₃=1.8126+0.1173=1.9299,

If dynamic reactive compensation device is configured at Inverter Station 2 (l=2), then the Inverter Station that 3 times straight-flow systems are corresponding Ac bus MIESCR_rev,i(i=1,2,3):

MIESCR_rev,1=MIESCR₁+ΔMIESCR₁=1.5411+0.1276=1.6687,

MIESCR_rev,2=MIESCR₂+ΔMIESCR₂=1.3443+0.2738=1.6181,

MIESCR_rev,3=MIESCR₃+ΔMIESCR₃=1.8126+0.1549=1.9675,

If dynamic reactive compensation device is configured at Inverter Station 2 (l=2), then 3 times DC inversion station ac bus MIESCR_rev,i(i=1,2,3):

MIESCR_rev,1=MIESCR₁+ΔMIESCR₁=1.5411+0.0997=1.6408,

MIESCR_rev,2=MIESCR₂+ΔMIESCR₂=1.3443+0.1149=1.4592,

MIESCR_rev,3=MIESCR₃+ΔMIESCR₃=1.8126+0.2278=2.0404,

Summary result of calculation, Inverter Station ac bus meter that 3 times straight-flow systems are corresponding and dynamic passive compensation Correction effective short-circuit ratio MIESCR of many direct currents of device effect_revAs shown in table 2.

The Inverter Station ac bus MIESCR that 23 times straight-flow systems of table are corresponding_rev

For arbitrary Inverter Station l (l=1,2,3), calculate after this Inverter Station configuration dynamic reactive compensation device all 3 times DC inversion station ac bus correction effective short-circuit ratioes MIESCR of many direct currents_rev,i(i=1,2,3) sum, shape Sequence parameter SMIESCR (l) of one-tenth Inverter Station l configuration dynamic reactive compensation device effect:

$SMIESCR\left(l\right)=\underset{i=1}{\overset{3}{\Σ}}{\mathrm{MIESCR}}_{rev,i},$

Will the MIESCR of each row in above table_revNumerical value is sued for peace, and obtains Inverter Station l configuration dynamic reactive and mends Repaying sequence parameter (aggregative indicator) SMIESCR (l) of device effect, result is as shown in table 3.

SMIESCR(1)	SMIESCR(2)	SMIESCR(3)
			5.1993	5.2543	5.1404

The Inverter Station SMIESCR index that 33 times straight-flow systems of table are corresponding

Said sequence parameter SMIESCR (l) (l=1,2,3) sorts from big to small, and its sequence is the most forward Multiple-circuit line Inverter Station ac bus voltage is recovered comprehensively to support work by bus for configuration dynamic reactive compensation device With the strongest bus, thereby determine that final configuration preference order sequence.

Sorting the SMIESCR (l) (l=1,2,3) in table 3 from big to small, result is as shown in table 4.Thus Obtain the determination of consequently recommended multiple-circuit line multiple-circuit line Inverter Station dynamic passive compensation configuration preference order Order of priority is ordered as Inverter Station 2, Inverter Station 1, Inverter Station 3.

Sequence	1	2	3
				SMIESCR	5.2543	5.1993	5.1404
Inverter Station	Inverter Station 2	Inverter Station 1	Inverter Station 3

The Inverter Station SMIESCR desired value ranking results that 43 times straight-flow systems of table are corresponding

Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the most right The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.

Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, But can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for this area For those of ordinary skill, without departing from the inventive concept of the premise, it is also possible to make some deformation and change Entering, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended power Profit requires to be as the criterion.

Claims (5)

1. a determination method for multiple-circuit line Inverter Station dynamic passive compensation configuration preference order, its feature exists In, comprise the steps:

N for feed-in receiving end AC network returns DC transmission system Inverter Station, calculates n and goes back to DC inversion station Effective short-circuit ratio MIESCR of the many direct currents of ac bus；Wherein, n is positive integer；

Arbitrary Inverter Station l of direct current is returned for n, calculates generation after Inverter Station configuration dynamic reactive compensation device N returns the many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR；

Arbitrary Inverter Station l of direct current is returned for n, calculates after this Inverter Station configuration dynamic reactive compensation device all N returns the correction effective short-circuit ratio of many direct currents of DC inversion station ac bus meter and dynamic reactive compensation device effect MIESCR_rev；Wherein, effective short-circuit ratio MIESCR of the many direct currents of described correction_revIncluding i-th time DC inversion station The many direct-current short circuit of correction of ac bus compare MIESCR_rev,i；L is more than or equal to 1 and to be less than or equal to the most whole of n Number, i is the positive integer more than or equal to 1 and less than or equal to n；

Arbitrary Inverter Station l of direct current is returned for n, calculates n after Inverter Station configuration dynamic reactive compensation device and return directly Stream Inverter Station ac bus correction effective short-circuit ratio MIESCR of many direct currents_rev,iSum, forms the configuration of Inverter Station l Aggregative indicator SMIESCR (l) of dynamic reactive compensation device effect；

Aggregative indicator SMIESCR (l) is sorted from big to small, determines final according to the result of sequence Configuration preference order sorts.

Multiple-circuit line Inverter Station dynamic passive compensation configuration preference order the most according to claim 1 is really Determine method, it is characterised in that the described n for feed-in receiving end AC network returns DC transmission system Inverter Station, Calculating n returns the process of DC inversion station ac bus effective short-circuit ratio MIESCR of many direct currents and includes:

A () comprises all n according to the foundation of perunit value parameter and returns the joint of straight-flow system Inverter Station ac bus node Point admittance matrix Y:

Y=[Y_ij]_n×n,

In formula, Y matrix dimension is n n, and wherein the i-th row, the i-th column element are the self-admittance of node i, i-th Row, jth column element are the transadmittance between node i and node j, 1≤i≤j≤n；

B () passes through Y matrix inversion operation, calculating comprises all n and returns straight-flow system Inverter Station ac bus joint The nodal impedance matrix Z of point:

Z=[Z_ij]_n×n=Y^-1,

In formula, Z matrix dimension is n n, and wherein the i-th row, the i-th column element are the self-impedance of node i, i-th Row, jth column element are the mutual impedance between node i and node j, 1≤i≤j≤n；

C () calculates all n and returns many direct currents effective short-circuit ratio index MIESCR of DC inversion station ac bus, Wherein i-th time DC inversion station ac bus MIESCR_iComputational methods include:

${\mathrm{MIESCR}}_i=\frac{1}{\underset{k=1}{\overset{n}{\Σ}}{z}_{ik}{P}_{dcn0,k}},$

Z in formula_ikFor Z matrix the i-th row, kth column element Z_ikCorresponding modulus value, P_dcn0,kDirect current is returned for kth Transmission system specified active power perunit value.

Multiple-circuit line Inverter Station dynamic passive compensation configuration preference order the most according to claim 1 is really Determine method, it is characterised in that described arbitrary Inverter Station l of direct current returned for n, calculate in the configuration of this Inverter Station dynamic The n produced after state reactive power compensator returns the many direct currents of Inverter Station ac bus effective short-circuit ratio increments Δ The step of MIESCR includes:

Calculate the i-th time many direct currents of DC inversion station ac bus effective short-circuit ratio increments Δ MIESCR_i, wherein ΔMIESCR_iComputational methods include:

${\mathrm{\ΔMIESCR}}_i=\frac{z_{il}{S}_{stat}}{\underset{k=1}{\overset{n}{\Σ}}{z}_{ik}{P}_{dcn0,k}},$

Z in formula_ilFor Z matrix the i-th row, l column element Z_ilCorresponding modulus value, S_statFor known dynamic reactive Compensation equipment rated capacity perunit value；I is the positive integer more than or equal to 1 and less than or equal to n.

Multiple-circuit line Inverter Station dynamic passive compensation configuration preference order the most according to claim 1 is really Determine method, it is characterised in that described arbitrary Inverter Station l of direct current returned for n, calculate in Inverter Station configuration dynamically After reactive power compensator, n returns DC inversion station ac bus correction effective short-circuit ratio MIESCR of many direct currents_revStep Suddenly include:

The many direct-current short circuit of correction calculating i-th time DC inversion station ac bus compare MIESCR_rev,i, wherein said MIESCR_rev,iComputational methods include:

MIESCR_rev,i=MIESCR_i+ΔMIESCR_i。

In formula, i is the positive integer more than or equal to 1 and less than or equal to n.

Multiple-circuit line Inverter Station dynamic passive compensation configuration preference order the most according to claim 1 is really Determine the determination method of order of priority, it is characterised in that described arbitrary Inverter Station l of direct current returned for n, calculate and exist After this Inverter Station configuration dynamic reactive compensation device, to return the DC inversion station many direct currents of ac bus correction the shortest for n MIESCR is compared on road_rev,iSum, forms the aggregative indicator of Inverter Station l configuration dynamic reactive compensation device effect The step of SMIESCR (l) including:

$SMIESCR\left(l\right)=\underset{i=1}{\overset{n}{\Σ}}{\mathrm{MIESCR}}_{rev,i}.$