CN110336283B - Analysis method and system for the influence of AC filter bank of converter station on power grid harmonics - Google Patents

Analysis method and system for the influence of AC filter bank of converter station on power grid harmonics Download PDF

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CN110336283B
CN110336283B CN201910635785.2A CN201910635785A CN110336283B CN 110336283 B CN110336283 B CN 110336283B CN 201910635785 A CN201910635785 A CN 201910635785A CN 110336283 B CN110336283 B CN 110336283B
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harmonic
filter bank
converter station
power grid
filter
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CN110336283A (en
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王朝亮
吕文韬
陆翌
谢海葳
徐群伟
沈忱
陈�峰
黄晓明
陆承宇
吴俊�
黄弘扬
楼伯良
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Zhejiang University ZJU
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
Taizhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
Taizhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/36—Arrangements for transfer of electric power between AC networks via a high-tension DC link
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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Abstract

本发明公开了一种换流站交流滤波器组对电网谐波影响的分析方法及系统。本发明的分析方法通过计算特高压换流站交流滤波器组投入前和投入后的换流站交流母线h次谐波电压，进而定义求取交流滤波器组谐波增益，直观分析不同频段下交流滤波器组的滤波性能，能有效分析交流滤波器组在部分频率范围对电网谐波放大的机理，从而可以避免交流滤波器组对电网谐波的放大。

Figure 201910635785

The invention discloses a method and system for analyzing the influence of an AC filter bank of a converter station on power grid harmonics. The analysis method of the present invention calculates the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank of the UHV converter station is put into operation, and then defines and obtains the harmonic gain of the AC filter bank, and intuitively analyzes the harmonic gain of the AC filter bank under different frequency bands. The filtering performance of the AC filter bank can effectively analyze the mechanism of the AC filter bank to amplify the harmonics of the power grid in some frequency ranges, so as to avoid the amplification of the power grid harmonics by the AC filter bank.

Figure 201910635785

Description

换流站交流滤波器组对电网谐波影响的分析方法及系统Analysis method and system for the influence of AC filter bank of converter station on power grid harmonics

技术领域technical field

本发明属于输配电技术领域，具体地说是一种特高压换流站交流滤波器组对电网谐波影响的分析方法及系统。The invention belongs to the technical field of power transmission and distribution, in particular to a method and system for analyzing the influence of an AC filter bank of an ultra-high voltage converter station on power grid harmonics.

背景技术Background technique

特高压直流输电工程中换流器会产生大量谐波并消耗大量无功，故特高压换流站需要配置多组交流滤波器组，在滤除谐波的同时兼具无功补偿功能。不同类型、参数的交流滤波器及电容器并联组成交流滤波器组，其滤波特性较为复杂，在某些频率范围内与电网阻抗特性相互作用会出现部分谐波放大现象。The converter in the UHV DC transmission project will generate a lot of harmonics and consume a lot of reactive power, so the UHV converter station needs to be equipped with multiple sets of AC filter banks, which can filter out the harmonics and also have the function of reactive power compensation. AC filters of different types and parameters and capacitors are connected in parallel to form an AC filter bank, and its filtering characteristics are relatively complex, and some harmonic amplification will occur when interacting with the impedance characteristics of the power grid in certain frequency ranges.

目前对于电容器及单调谐滤波器引起的谐波放大及谐振现象已有一些研究，但关于交流滤波器组的整体滤波性能及其部分谐波放大作用的研究较少见到。At present, there have been some studies on the harmonic amplification and resonance phenomenon caused by capacitors and single-tuned filters, but the research on the overall filtering performance of AC filter banks and their partial harmonic amplification effects is rarely seen.

发明内容SUMMARY OF THE INVENTION

针对上述现有技术存在的情况，本发明提供一种特高压换流站交流滤波器组对电网谐波影响的分析方法及系统，其用于分析交流滤波器组在部分频率范围对电网谐波放大的机理，可避免交流滤波器组对电网谐波的放大。In view of the existing situation in the prior art, the present invention provides a method and system for analyzing the influence of an AC filter bank of an ultra-high voltage converter station on power grid harmonics. The amplification mechanism can avoid the amplification of the harmonics of the power grid by the AC filter bank.

为此，本发明采用如下的技术方案：换流站交流滤波器组对电网谐波影响的分析方法，其包括：For this reason, the present invention adopts the following technical scheme: an analysis method for the influence of the AC filter bank of the converter station on the harmonics of the power grid, which includes:

步骤1：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压

Figure BDA0002130294520000011
和
Figure BDA0002130294520000012
按照如下式所示计算：Step 1: Obtain the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into operation
Figure BDA0002130294520000011
and
Figure BDA0002130294520000012
Calculate as follows:

Figure BDA0002130294520000021
Figure BDA0002130294520000021

其中，ω为h次谐波角频率，ω＝h·100π，Zs(ω)为采用基波短路容量估算电网背景谐波阻抗，Zf(ω)为换流站交流滤波器组等效阻抗，根据换流站交流滤波器组参数计算得到，

Figure BDA0002130294520000022
表示换流变出口h次谐波电流，
Figure BDA0002130294520000023
表示电网背景h次谐波电压；Among them, ω is the h-order harmonic angular frequency, ω=h·100π, Z s (ω) is the background harmonic impedance of the power grid estimated by the fundamental wave short-circuit capacity, and Z f (ω) is the equivalent of the AC filter bank of the converter station. Impedance, calculated according to the parameters of the AC filter bank of the converter station,
Figure BDA0002130294520000022
represents the h-th harmonic current at the converter outlet,
Figure BDA0002130294520000023
Represents the h-th harmonic voltage of the grid background;

步骤2：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压

Figure BDA0002130294520000024
和
Figure BDA0002130294520000025
的比值的模值；Step 2: Obtain the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into use
Figure BDA0002130294520000024
and
Figure BDA0002130294520000025
The modulo value of the ratio;

步骤3：计算步骤2中求得的模值以10为底的对数，记作交流滤波器组谐波增益A(ω)，用来衡量交流滤波器组的滤波性能，定义式如下：Step 3: Calculate the logarithm of the modulus value obtained in step 2 with the base 10, and record it as the harmonic gain A(ω) of the AC filter bank, which is used to measure the filtering performance of the AC filter bank. The definition formula is as follows:

Figure BDA0002130294520000026
Figure BDA0002130294520000026

进一步的，所述的交流滤波器组谐波增益A(ω)：Further, the harmonic gain A(ω) of the AC filter bank:

对h次谐波来说，当A(ω)<0时，交流滤波器组投入后换流站交流母线h次谐波电压水平有所降低；当A(ω)>0时，交流滤波器组投入后换流站交流母线h次谐波电压水平比投入前还大，交流滤波器组对h次谐波起放大作用。For the h-th harmonic, when A(ω)<0, the voltage level of the h-th harmonic of the AC bus of the converter station decreases after the AC filter bank is put into use; when A(ω)>0, the AC filter After the group is put into operation, the voltage level of the h-th harmonic of the AC bus of the converter station is larger than that before the operation, and the AC filter group plays a role in amplifying the h-th harmonic.

进一步的，基于交流滤波器组谐波增益A(ω)求解分界点，以绘制其谐波增益曲线，即求解A(ω)＝0的解。Further, the boundary point is solved based on the harmonic gain A(ω) of the AC filter bank to draw its harmonic gain curve, that is, the solution of A(ω)=0 is obtained.

更进一步的，定义2Zf(ω)+Zs(ω)＝0的解为I型分界点hI1、hI2，Zf(ω)无穷大的解为II型分界点hII1；当谐波次数h满足0<h<hI1或hII1<h<hI2时，交流滤波器组将出现谐波放大现象。Further, the solution of 2Z f (ω)+Z s (ω)=0 is defined as the I-type demarcation points h I1 , h I2 , and the infinite solution of Z f (ω) is the II-type demarcation point h II1 ; when the harmonic When the order h satisfies 0<h<h I1 or h II1 <h<h I2 , the AC filter bank will appear harmonic amplification.

本发明还采用如下的技术方案：一种换流站交流滤波器组对电网谐波影响的分析系统，其包括：The present invention also adopts the following technical scheme: an analysis system for the influence of the AC filter bank of the converter station on the harmonics of the power grid, which includes:

换流站交流母线h次谐波电压计算单元：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压

Figure BDA0002130294520000027
和
Figure BDA0002130294520000028
按照如下式所示计算：The calculation unit of the h-th harmonic voltage of the AC bus of the converter station: to obtain the h-th harmonic voltage of the AC bus of the converter station before and after the AC filter bank is put into operation
Figure BDA0002130294520000027
and
Figure BDA0002130294520000028
Calculate as follows:

Figure BDA0002130294520000031
Figure BDA0002130294520000031

其中，ω为h次谐波角频率，ω＝h·100π，Zs(ω)为采用基波短路容量估算电网背景谐波阻抗，Zf(ω)为换流站交流滤波器组等效阻抗，根据换流站交流滤波器组参数计算得到，

Figure BDA0002130294520000032
表示换流变出口h次谐波电流，
Figure BDA0002130294520000033
表示电网背景h次谐波电压；Among them, ω is the h-order harmonic angular frequency, ω=h·100π, Z s (ω) is the background harmonic impedance of the power grid estimated by the fundamental wave short-circuit capacity, and Z f (ω) is the equivalent of the AC filter bank of the converter station. Impedance, calculated according to the parameters of the AC filter bank of the converter station,
Figure BDA0002130294520000032
represents the h-th harmonic current at the converter outlet,
Figure BDA0002130294520000033
Represents the h-th harmonic voltage of the grid background;

模值计算单元：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压

Figure BDA0002130294520000034
和
Figure BDA0002130294520000035
的比值的模值；Modulo value calculation unit: Obtain the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into use
Figure BDA0002130294520000034
and
Figure BDA0002130294520000035
The modulo value of the ratio;

交流滤波器组谐波增益计算单元：计算模值计算单元中求得的模值以10为底的对数，记作交流滤波器组谐波增益A(ω)，用来衡量交流滤波器组的滤波性能，定义式如下：AC filter bank harmonic gain calculation unit: Calculate the logarithm of the modulus value obtained in the modulus value calculation unit with the base 10, which is recorded as the AC filter bank harmonic gain A(ω), which is used to measure the AC filter bank. The filtering performance of , is defined as follows:

Figure BDA0002130294520000036
Figure BDA0002130294520000036

本发明具有的有益效果是：本发明采用一种特高压换流站交流滤波器组对电网谐波影响的分析方法及系统，定义了交流滤波器组谐波增益指标，该指标可直观分析不同频段下交流滤波器组的滤波性能，能有效分析交流滤波器组在部分频率范围对电网谐波放大的机理，从而可以避免交流滤波器组对电网谐波的放大。The beneficial effects of the present invention are as follows: the present invention adopts a method and system for analyzing the influence of the AC filter bank of an ultra-high voltage converter station on the harmonics of the power grid, and defines the harmonic gain index of the AC filter bank, which can intuitively analyze different The filtering performance of the AC filter bank in the frequency band can effectively analyze the mechanism of the AC filter bank to amplify the harmonics of the power grid in some frequency ranges, so as to avoid the amplification of the power grid harmonics by the AC filter bank.

附图说明Description of drawings

图1是本发明具体实施方式中特高压换流站h次谐波等值电路图，

Figure BDA0002130294520000037
为电网背景h次谐波电压，Zs为电网背景h次谐波阻抗，
Figure BDA0002130294520000038
为换流变出口h次谐波电流，
Figure BDA0002130294520000039
为流入电网的h次谐波电流，Zf为换流站已投运交流滤波器组的h次等效谐波阻抗，
Figure BDA00021302945200000310
为换流站交流母线h次谐波电压。Fig. 1 is the equivalent circuit diagram of the h-th harmonic of the UHV converter station in the specific embodiment of the present invention,
Figure BDA0002130294520000037
is the grid background h harmonic voltage, Z s is the grid background h harmonic impedance,
Figure BDA0002130294520000038
is the h-th harmonic current at the converter outlet,
Figure BDA0002130294520000039
is the h-order harmonic current flowing into the power grid, Z f is the h-order equivalent harmonic impedance of the AC filter bank that has been put into operation in the converter station,
Figure BDA00021302945200000310
is the h-th harmonic voltage of the AC bus of the converter station.

图2是一种HP12/24双调谐滤波器的结构图，参数为C1、C2表示电容1和电容2，L1、L2表示电感1和电感2，R1表示电阻。Fig. 2 is a structure diagram of an HP12/24 double-tuned filter, the parameters are C 1 , C 2 represent capacitor 1 and capacitor 2, L 1 and L 2 represent inductor 1 and inductor 2, and R 1 represent resistor.

图3是本发明具体实施方式中谐波增益曲线示意图，0轴上方为放大区，在此区域交流滤波器组将导致谐波放大现象；0轴下方为吸收区，增益越小吸收效果越好。其中，p1、p2称为峰点，v1、v2称为谷点，hI1、hI2称为I型分界点，hII1称为II型分界点(I型分界点和II型分界点统称为分界点)，可以看出谷点v1、v2正好位于滤波器组的两个调谐点处。3 is a schematic diagram of the harmonic gain curve in the specific embodiment of the present invention. Above the 0-axis is the amplification area, where the AC filter bank will lead to harmonic amplification; the lower part of the 0-axis is the absorption area, and the smaller the gain, the better the absorption effect. . Among them, p 1 and p 2 are called peak points, v 1 and v 2 are called valley points, h I1 and h I2 are called I-type demarcation points, and h II1 are called II-type demarcation points (I-type demarcation point and II-type demarcation point The demarcation points are collectively referred to as demarcation points), and it can be seen that the valley points v 1 and v 2 are located exactly at the two tuning points of the filter bank.

具体实施方式Detailed ways

以下结合说明书附图和具体实施方式详细描述本发明，但本发明不受实施例所限。The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited by the examples.

本实施例提供一种特高压换流站交流滤波器组对电网谐波影响的分析方法，其包括以下步骤：This embodiment provides a method for analyzing the influence of an AC filter bank of an ultra-high voltage converter station on power grid harmonics, which includes the following steps:

步骤1：根据图1的特高压换流站h次谐波等值电路图，求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压

Figure BDA0002130294520000041
和
Figure BDA0002130294520000042
按照如下式所示计算。Step 1: According to the equivalent circuit diagram of the h-th harmonic of the UHV converter station in Fig. 1, obtain the h-th harmonic voltage of the AC bus of the converter station before and after the AC filter bank is put into operation
Figure BDA0002130294520000041
and
Figure BDA0002130294520000042
Calculate as shown below.

Figure BDA0002130294520000043
Figure BDA0002130294520000043

其中，ω为h次谐波角频率，ω＝h·100π，Zs(ω)为采用基波短路容量估算电网背景谐波阻抗，Zf(ω)为换流站交流滤波器组等效阻抗，可根据换流站交流滤波器组参数计算得到。Among them, ω is the h-order harmonic angular frequency, ω=h·100π, Z s (ω) is the background harmonic impedance of the power grid estimated by the fundamental wave short-circuit capacity, and Z f (ω) is the equivalent of the AC filter bank of the converter station. The impedance can be calculated according to the parameters of the AC filter bank of the converter station.

步骤2：求取交流滤波器组投入前和投入后的换流站交流母线谐波电压

Figure BDA0002130294520000044
和
Figure BDA0002130294520000045
的比值的模值。Step 2: Obtain the harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into operation
Figure BDA0002130294520000044
and
Figure BDA0002130294520000045
The modulo value of the ratio.

步骤3：计算步骤2中求得的模值以10为底的对数，记作交流滤波器组谐波增益A(ω)，用来衡量交流滤波器组的滤波性能，定义式如下：Step 3: Calculate the logarithm of the modulus value obtained in step 2 with the base 10, and record it as the harmonic gain A(ω) of the AC filter bank, which is used to measure the filtering performance of the AC filter bank. The definition formula is as follows:

Figure BDA0002130294520000046
Figure BDA0002130294520000046

对h次谐波来说，当A(ω)<0时，交流滤波器组投入后换流站交流母线h次谐波电压水平有所降低；当A(ω)>0时，交流滤波器组投入后换流站交流母线h次谐波电压水平比投运前还大，交流滤波器组对h次谐波起放大作用。For the h-th harmonic, when A(ω)<0, the voltage level of the h-th harmonic of the AC bus of the converter station decreases after the AC filter bank is put into use; when A(ω)>0, the AC filter After the group is put into operation, the voltage level of the h-th harmonic of the AC bus of the converter station is larger than that before the operation, and the AC filter group plays a role in amplifying the h-th harmonic.

以一台HP12/24双调谐滤波器为例，其结构如图2所示，参数为C1＝3.744μF、C2＝7.083μF、L1＝8.172mH、L2＝5.587mH、R1＝270Ω。Taking a HP12/24 double-tuned filter as an example, its structure is shown in Figure 2, and the parameters are C 1 =3.744μF, C 2 =7.083μF, L 1 =8.172mH, L 2 =5.587mH, R 1 = 270Ω.

基于交流滤波器组谐波增益A(ω)求解分界点，即求解A(ω)＝0的解，绘制其谐波增益曲线如图3所示。Based on the harmonic gain A(ω) of the AC filter bank, the demarcation point is solved, that is, the solution of A(ω)=0 is solved, and its harmonic gain curve is drawn as shown in Figure 3.

定义2Zf(ω)+Zs(ω)＝0的解为I型分界点hI1、hI2，Zf(ω)无穷大的解为II型分界点hII1。当谐波次数h满足0<h<hI1或hII1<h<hI2时，交流滤波器将导致谐波放大。The solution of 2Z f (ω)+Z s (ω)=0 is defined as the I-type demarcation points h I1 and h I2 , and the solution of Z f (ω) infinity is the II-type demarcation point h II1 . When the harmonic order h satisfies 0<h<h I1 or h II1 <h<h I2 , the AC filter will cause harmonic amplification.

图3中可以看出，0轴上方为放大区，在此区域交流滤波器组将导致谐波放大现象；0轴下方为吸收区，增益越小吸收效果越好。其中，p1、p2称为峰点，v1、v2称为谷点，hI1、hI2称为I型分界点，hII1称为II型分界点(I型分界点和II型分界点统称为分界点)，可以看出谷点v1、v2正好位于HP12/24双调谐滤波器的两个调谐点处。As can be seen in Figure 3, the top of the 0-axis is the amplification area, where the AC filter bank will lead to harmonic amplification; the bottom of the 0-axis is the absorption area, and the smaller the gain, the better the absorption effect. Among them, p 1 and p 2 are called peak points, v 1 and v 2 are called valley points, h I1 and h I2 are called I-type demarcation points, and h II1 are called II-type demarcation points (I-type demarcation point and II-type demarcation point The demarcation points are collectively referred to as demarcation points), it can be seen that the valley points v 1 and v 2 are located exactly at the two tuning points of the HP12/24 double-tuned filter.

以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (8)

1.换流站交流滤波器组对电网谐波影响的分析方法，其特征在于，包括：1. the analysis method of the influence of the AC filter bank of the converter station on the harmonics of the power grid, is characterized in that, comprises: 步骤1：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压
Figure FDA0002130294510000011
和
Figure FDA0002130294510000012
按照如下式所示计算：Step 1: Obtain the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into operation
Figure FDA0002130294510000011
and
Figure FDA0002130294510000012
Calculate as follows:
Figure FDA0002130294510000013
Figure FDA0002130294510000013
 其中，ω为h次谐波角频率，ω＝h·100π，Zs(ω)为采用基波短路容量估算电网背景谐波阻抗，Zf(ω)为换流站交流滤波器组等效阻抗，根据换流站交流滤波器组参数计算得到，
Figure FDA0002130294510000014
表示换流变出口h次谐波电流，
Figure FDA0002130294510000015
表示电网背景h次谐波电压；Among them, ω is the h-order harmonic angular frequency, ω=h·100π, Z s (ω) is the background harmonic impedance of the power grid estimated by the fundamental wave short-circuit capacity, and Z f (ω) is the equivalent of the AC filter bank of the converter station. Impedance, calculated according to the parameters of the AC filter bank of the converter station,
Figure FDA0002130294510000014
represents the h-th harmonic current at the converter outlet,
Figure FDA0002130294510000015
Represents the h-th harmonic voltage of the grid background; 步骤2：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压
Figure FDA0002130294510000016
和
Figure FDA0002130294510000017
的比值的模值；Step 2: Obtain the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into use
Figure FDA0002130294510000016
and
Figure FDA0002130294510000017
The modulo value of the ratio; 步骤3：计算步骤2中求得的模值以10为底的对数，记作交流滤波器组谐波增益A(ω)，用来衡量交流滤波器组的滤波性能，定义式如下：Step 3: Calculate the logarithm of the modulus value obtained in step 2 with the base 10, and record it as the harmonic gain A(ω) of the AC filter bank, which is used to measure the filtering performance of the AC filter bank. The definition formula is as follows:
Figure FDA0002130294510000018
Figure FDA0002130294510000018
 2.根据权利要求1所述的换流站交流滤波器组对电网谐波影响的分析方法，其特征在于，所述的交流滤波器组谐波增益A(ω)：2. the analysis method that the AC filter bank of converter station according to claim 1 affects the power grid harmonic, it is characterized in that, described AC filter bank harmonic gain A (ω): 对h次谐波来说，当A(ω)<0时，交流滤波器组投入后换流站交流母线h次谐波电压水平有所降低；当A(ω)>0时，交流滤波器组投入后换流站交流母线h次谐波电压水平比投入前还大，交流滤波器组对h次谐波起放大作用。For the h-th harmonic, when A(ω)<0, the voltage level of the h-th harmonic of the AC bus of the converter station decreases after the AC filter bank is put into use; when A(ω)>0, the AC filter After the group is put into operation, the voltage level of the h-th harmonic of the AC bus of the converter station is larger than that before it is put into use, and the AC filter group plays a role in amplifying the h-th harmonic. 3.根据权利要求1或2所述的换流站交流滤波器组对电网谐波的影响分析方法，其特征在于，基于交流滤波器组谐波增益A(ω)求解分界点，以绘制其谐波增益曲线，即求解A(ω)＝0的解。3. The method for analyzing the influence of AC filter bank of converter station according to claim 1 and 2 on power grid harmonics, it is characterized in that, based on AC filter bank harmonic gain A(ω) solves the dividing point, to draw its Harmonic gain curve, i.e. solving for A(ω)=0. 4.根据权利要求3所述的换流站交流滤波器组对电网谐波的影响分析方法，其特征在于，定义2Zf(ω)+Zs(ω)＝0的解为I型分界点hI1、hI2，Zf(ω)无穷大的解为II型分界点hII1；当谐波次数h满足0<h<hI1或hII1<h<hI2时，交流滤波器组将出现谐波放大现象。4. the method for analyzing the influence of converter station AC filter bank on power grid harmonics according to claim 3, is characterized in that, the solution of definition 2Z f (ω)+Z s (ω)=0 is the I type demarcation point h I1 , h I2 , Z f (ω) infinite solution is the II-type demarcation point h II1 ; when the harmonic order h satisfies 0<h<h I1 or h II1 <h<h I2 , the AC filter bank will appear The phenomenon of harmonic amplification. 5.换流站交流滤波器组对电网谐波影响的分析系统，其特征在于，包括：5. The analysis system of the influence of the AC filter bank of the converter station on the harmonics of the power grid is characterized in that, including: 换流站交流母线h次谐波电压计算单元：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压
Figure FDA0002130294510000021
和
Figure FDA0002130294510000022
按照如下式所示计算：The calculation unit of the h-th harmonic voltage of the AC bus of the converter station: to obtain the h-th harmonic voltage of the AC bus of the converter station before and after the AC filter bank is put into operation
Figure FDA0002130294510000021
and
Figure FDA0002130294510000022
Calculate as follows:
Figure FDA0002130294510000023
Figure FDA0002130294510000023
 其中，ω为h次谐波角频率，ω＝h·100π，Zs(ω)为采用基波短路容量估算电网背景谐波阻抗，Zf(ω)为换流站交流滤波器组等效阻抗，根据换流站交流滤波器组参数计算得到，
Figure FDA0002130294510000024
表示换流变出口h次谐波电流，
Figure FDA0002130294510000025
表示电网背景h次谐波电压；Among them, ω is the h-order harmonic angular frequency, ω=h·100π, Z s (ω) is the background harmonic impedance of the power grid estimated by the fundamental wave short-circuit capacity, and Z f (ω) is the equivalent of the AC filter bank of the converter station. Impedance, calculated according to the parameters of the AC filter bank of the converter station,
Figure FDA0002130294510000024
represents the h-th harmonic current at the converter outlet,
Figure FDA0002130294510000025
Represents the h-th harmonic voltage of the grid background; 模值计算单元：求取交流滤波器组投入前和投入后的换流站交流母线h次谐波电压
Figure FDA0002130294510000026
和
Figure FDA0002130294510000027
的比值的模值；Modulo value calculation unit: Obtain the h-th harmonic voltage of the AC busbar of the converter station before and after the AC filter bank is put into use
Figure FDA0002130294510000026
and
Figure FDA0002130294510000027
The modulo value of the ratio; 交流滤波器组谐波增益计算单元：计算模值计算单元中求得的模值以10为底的对数，记作交流滤波器组谐波增益A(ω)，用来衡量交流滤波器组的滤波性能，定义式如下：AC filter bank harmonic gain calculation unit: Calculate the logarithm of the modulus value obtained in the modulus value calculation unit with the base 10, which is recorded as the AC filter bank harmonic gain A(ω), which is used to measure the AC filter bank. The filtering performance of , is defined as follows:
Figure FDA0002130294510000028
Figure FDA0002130294510000028
 6.根据权利要求5所述的换流站交流滤波器组对电网谐波影响的分析系统，其特征在于，6. The analysis system of the influence of AC filter bank of converter station on power grid harmonics according to claim 5, is characterized in that, 所述的交流滤波器组谐波增益A(ω)：Said AC filter bank harmonic gain A(ω): 对h次谐波来说，当A(ω)<0时，交流滤波器组投入后换流站交流母线h次谐波电压水平有所降低；当A(ω)>0时，交流滤波器组投入后换流站交流母线h次谐波电压水平比投入前还大，交流滤波器组对h次谐波起放大作用。For the h-th harmonic, when A(ω)<0, the voltage level of the h-th harmonic of the AC bus of the converter station decreases after the AC filter bank is put into use; when A(ω)>0, the AC filter After the group is put into operation, the voltage level of the h-th harmonic of the AC bus of the converter station is larger than that before it is put into use, and the AC filter group plays a role in amplifying the h-th harmonic. 7.根据权利要求5或6所述的换流站交流滤波器组对电网谐波影响的分析系统，其特征在于，基于交流滤波器组谐波增益A(ω)求解分界点，以绘制其谐波增益曲线，即求解A(ω)＝0的解。7. The analysis system of the influence of AC filter bank of converter station on power grid harmonics according to claim 5 or 6, is characterized in that, based on AC filter bank harmonic gain A(ω) solves the dividing point, to draw its Harmonic gain curve, i.e. solving for A(ω)=0. 8.根据权利要求7所述的换流站交流滤波器组对电网谐波影响的分析系统，其特征在于，定义2Zf(ω)+Zs(ω)＝0的解为I型分界点hI1、hI2，Zf(ω)无穷大的解为II型分界点hII1；当谐波次数h满足0<h<hI1或hII1<h<hI2时，交流滤波器组将出现谐波放大现象。8. The analysis system of converter station AC filter bank according to claim 7 on the influence of power grid harmonics, is characterized in that, the solution of defining 2Z f (ω)+Z s (ω)=0 is the I-type demarcation point h I1 , h I2 , Z f (ω) infinite solution is the II-type demarcation point h II1 ; when the harmonic order h satisfies 0<h<h I1 or h II1 <h<h I2 , the AC filter bank will appear The phenomenon of harmonic amplification.
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101355251A (en) * 2008-09-27 2009-01-28 国网直流工程建设有限公司 A New Type of AC Filter Design for UHVDC Transmission System
CN101860037A (en) * 2010-05-26 2010-10-13 浙江大学 A Method for Determining Harmonic Currents in Grid Side of HVDC Transmission System
CN103795061A (en) * 2014-02-27 2014-05-14 国家电网公司 Second harmonic filter of high-voltage direct-current transmission system and parameter design method thereof
CN105164907A (en) * 2013-08-29 2015-12-16 韩国电力公社 Converters for HVDC Transmission
CN106159952A (en) * 2016-08-31 2016-11-23 南方电网科学研究院有限责任公司 Switching system and switching method for alternating current filter
CN106528950A (en) * 2016-10-18 2017-03-22 国网浙江省电力公司电力科学研究院 Simplified calculation method for equivalent modeling of alternating-current filter
CN107947219A (en) * 2017-12-06 2018-04-20 中国南方电网有限责任公司超高压输电公司广州局 Harmonic analysis method caused by a kind of extra-high voltage DC transmission system DC magnetic bias
CN108988375A (en) * 2018-07-12 2018-12-11 南方电网科学研究院有限责任公司 Harmonic instability analysis method considering bilateral influence
CN109103869A (en) * 2018-07-12 2018-12-28 南方电网科学研究院有限责任公司 Harmonic instability evaluation method for direct-current and receiving end weak system
CN109347106A (en) * 2018-11-07 2019-02-15 国家电网有限公司 Method and system for evaluating loss of alternating current filter
CN109428339A (en) * 2017-08-28 2019-03-05 华北电力大学（保定） It is a kind of suitable for the idle control of extra-high-voltage direct-current power transmission converter and the optimization method of harmonic wave
CN109617111A (en) * 2018-12-14 2019-04-12 华南理工大学 A method for measuring the harmonic interaction intensity on the AC side of the inverter station of the multi-infeed DC system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4373614B2 (en) * 2001-01-04 2009-11-25 日本曹達株式会社 Harmonic suppression device
CN100346550C (en) * 2005-07-18 2007-10-31 西安交通大学 Control method for restraining oscillate based on mixed electric power filter
CN103050975B (en) * 2012-12-04 2015-06-24 国网智能电网研究院 Parameter design method for high-voltage high-capacity VSC (voltage source converter)
CN104269851B (en) * 2014-10-22 2016-08-17 沈阳鼎盛中贝机电设备有限公司 A kind of iterated electrical filter

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101355251A (en) * 2008-09-27 2009-01-28 国网直流工程建设有限公司 A New Type of AC Filter Design for UHVDC Transmission System
CN101860037A (en) * 2010-05-26 2010-10-13 浙江大学 A Method for Determining Harmonic Currents in Grid Side of HVDC Transmission System
CN105164907A (en) * 2013-08-29 2015-12-16 韩国电力公社 Converters for HVDC Transmission
CN103795061A (en) * 2014-02-27 2014-05-14 国家电网公司 Second harmonic filter of high-voltage direct-current transmission system and parameter design method thereof
CN106159952A (en) * 2016-08-31 2016-11-23 南方电网科学研究院有限责任公司 Switching system and switching method for alternating current filter
CN106528950A (en) * 2016-10-18 2017-03-22 国网浙江省电力公司电力科学研究院 Simplified calculation method for equivalent modeling of alternating-current filter
CN109428339A (en) * 2017-08-28 2019-03-05 华北电力大学（保定） It is a kind of suitable for the idle control of extra-high-voltage direct-current power transmission converter and the optimization method of harmonic wave
CN107947219A (en) * 2017-12-06 2018-04-20 中国南方电网有限责任公司超高压输电公司广州局 Harmonic analysis method caused by a kind of extra-high voltage DC transmission system DC magnetic bias
CN108988375A (en) * 2018-07-12 2018-12-11 南方电网科学研究院有限责任公司 Harmonic instability analysis method considering bilateral influence
CN109103869A (en) * 2018-07-12 2018-12-28 南方电网科学研究院有限责任公司 Harmonic instability evaluation method for direct-current and receiving end weak system
CN109347106A (en) * 2018-11-07 2019-02-15 国家电网有限公司 Method and system for evaluating loss of alternating current filter
CN109617111A (en) * 2018-12-14 2019-04-12 华南理工大学 A method for measuring the harmonic interaction intensity on the AC side of the inverter station of the multi-infeed DC system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
The Impacts of AC Filters to Power Grid Harmonic in UHVDC Converter Station;LV Wentao,etc.;《2018 2nd IEEE Conference on Energy Internet and Energy System》;20181022;第1-5页 *
基于奇异值分解理论的谐波放大分析方法;李杨 等;《电力系统自动化》;20170425;第41卷(第８期);第16-20页 *

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