CN105262389B - A kind of positive-negative sequence separation method of double-fed fan motor unit DC bias adaptive equalization - Google Patents
A kind of positive-negative sequence separation method of double-fed fan motor unit DC bias adaptive equalization Download PDFInfo
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Abstract
本发明提供一种双馈风电机组直流偏量自适应补偿的正负序分离方法，包括以下步骤：采集定子三相电压、定子三相电流和转子三相电流，并进行3S/2S变换；通过积分闭环控制确定定子电压偏差信号、定子电流偏差信号以及转子电流偏差信号；获取同步定子电压、同步定子电流和同步转子电流，并对其进行2S/3S变换。本发明提供的双馈风电机组直流偏量自适应补偿的正负序分离方法，对低频信号具有更强的抑制能力，消除了直流偏量的存在会恶化锁频环稳定和锁相准确的影响。
The present invention provides a positive and negative sequence separation method for adaptive compensation of DC offset of a doubly-fed wind turbine, comprising the following steps: collecting stator three-phase voltage, stator three-phase current and rotor three-phase current, and performing 3S/2S conversion; Integral closed-loop control determines the stator voltage deviation signal, stator current deviation signal and rotor current deviation signal; obtains the synchronous stator voltage, synchronous stator current and synchronous rotor current, and performs 2S/3S conversion on them. The positive and negative sequence separation method for adaptive compensation of the DC offset of the doubly-fed wind turbine provided by the present invention has a stronger ability to suppress low-frequency signals, and eliminates the influence of the existence of the DC offset that will deteriorate the stability of the frequency-locked loop and the accuracy of phase-locking .
Description
技术领域technical field
本发明属于风力发电技术领域，具体涉及一种双馈风电机组直流偏量自适应补偿的正负序分离方法。The invention belongs to the technical field of wind power generation, and in particular relates to a positive and negative sequence separation method for adaptive compensation of DC offset of a doubly-fed wind turbine.
背景技术Background technique
在分布式发电、柔性交流输电、有源滤波器、高压直流输电等领域，准确实时地估算电网电压信号的幅值、频率和相角是一个至关重要的技术手段。在双馈风力发电系统中，电网同步技术实现了有功功率和无功功率的独立控制。在风电场上，电网频繁出现不平衡、相位突变、跌落、骤升、频率变化和谐波畸变等非理想现象，这些现象对交流信号正负序分离方法提出较高的性能要求。因此交流信号正负序分离法方法优劣攸关关键，它是分布式发电系统的核心和命脉。In the fields of distributed power generation, flexible AC transmission, active filter, high-voltage direct current transmission, etc., it is a crucial technical means to accurately and real-time estimate the amplitude, frequency and phase angle of the grid voltage signal. In the doubly-fed wind power generation system, grid synchronization technology realizes the independent control of active power and reactive power. In wind farms, non-ideal phenomena such as unbalance, phase mutation, drop, sudden rise, frequency change and harmonic distortion frequently occur in the power grid. These phenomena put forward higher performance requirements for the positive and negative sequence separation method of AC signals. Therefore, the method of separating the positive and negative sequences of AC signals is the key, and it is the core and lifeblood of the distributed power generation system.
对于文献1提供的正负序分离方法来说，该方法要锁定正序电压分量的相位，就必须分离出正序分量。然而DSP只能采样0V～3V的电压信号，为了不失真地采样交流正弦信号，采样通道的电压跟随器输出端上要叠加一个3V的上拉电压。为了还原原始信号，在ADC模块里要减去上拉电压的采样值。然而，实验中却很难完全准确地消除上拉电压采样值。直流偏量的存在恶化了锁频环的稳定性和锁相的准确性。For the positive-sequence and negative-sequence separation method provided in Document 1, the positive-sequence component must be separated in order to lock the phase of the positive-sequence voltage component. However, DSP can only sample voltage signals from 0V to 3V. In order to sample AC sinusoidal signals without distortion, a 3V pull-up voltage should be superimposed on the output terminal of the voltage follower of the sampling channel. In order to restore the original signal, the sampling value of the pull-up voltage is subtracted in the ADC module. However, it is difficult to completely and accurately eliminate the sampled value of the pull-up voltage in the experiment. The existence of the DC offset deteriorates the stability of the frequency-locked loop and the accuracy of the phase-lock.
文献1：丁杰，电网不平衡条件下LCL-VSR控制策略研究，[D].合肥工业大学硕士学位论文，2011.4。Document 1: Ding Jie, Research on LCL-VSR Control Strategy under Unbalanced Grid Conditions, [D]. Master's Degree Thesis of Hefei University of Technology, 2011.4.
发明内容Contents of the invention
为了克服上述现有技术的不足，本发明提供一种双馈风电机组直流偏量自适应补偿的正负序分离方法，对低频信号具有更强的抑制能力，消除了直流偏量的存在会恶化锁频环稳定和锁相准确的影响。In order to overcome the deficiencies of the prior art above, the present invention provides a positive and negative sequence separation method for DC bias adaptive compensation of doubly-fed wind turbines, which has a stronger ability to suppress low-frequency signals and eliminates the deterioration of the DC bias The influence of FLL stability and PLL accuracy.
为了实现上述发明目的，本发明采取如下技术方案：In order to realize the above-mentioned purpose of the invention, the present invention takes the following technical solutions:
本发明提供一种双馈风电机组直流偏量自适应补偿的正负序分离方法，所述方法包括以下步骤：The present invention provides a positive and negative sequence separation method for adaptive compensation of DC offset of a doubly-fed wind turbine. The method includes the following steps:
步骤1：采集定子三相电压、定子三相电流和转子三相电流，并进行3S/2S变换；Step 1: Collect stator three-phase voltage, stator three-phase current and rotor three-phase current, and perform 3S/2S conversion;
步骤2：通过积分闭环控制确定定子电压偏差信号、定子电流偏差信号以及转子电流偏差信号；Step 2: Determine the stator voltage deviation signal, stator current deviation signal and rotor current deviation signal through integral closed-loop control;
步骤3：获取同步定子电压、同步定子电流和同步转子电流，并对其进行2S/3S变换。Step 3: Obtain the synchronous stator voltage, synchronous stator current and synchronous rotor current, and perform 2S/3S transformation on them.
所述步骤1具体包括以下步骤：Described step 1 specifically comprises the following steps:
步骤1-1：双馈风电机组正常工作时，通过定子电压传感器、定子电流传感器和转子电流传感器分别采集定子三相电压、定子三相电流和转子三相电流；Step 1-1: When the double-fed wind turbine is working normally, the stator three-phase voltage, stator three-phase current and rotor three-phase current are respectively collected through the stator voltage sensor, stator current sensor and rotor current sensor;
步骤1-2：将定子三相电压、定子三相电流、转子三相电流进行3S/2S变换，得到两相静止坐标系下的定子电压、定子电流和转子电流；定子电压包括α相定子电压vsα和β相定子电压vsβ，定子电流包括α相定子电流isα和β相定子电流isβ，转子电流包括α相转子电流irα和β相转子电流irβ，分别表示为：Step 1-2: Perform 3S/2S transformation on the stator three-phase voltage, stator three-phase current and rotor three-phase current to obtain the stator voltage, stator current and rotor current in the two-phase stationary coordinate system; the stator voltage includes the α-phase stator voltage v sα and β-phase stator voltage v sβ , the stator current includes α-phase stator current is α and β-phase stator current is sβ , and the rotor current includes α-phase rotor current i rα and β-phase rotor current i rβ , expressed as:
其中，vsa、vsb、vsc表示定子三相电压，isa、isb、isc表示定子三相电流，ira、irb、irc表示转子三相电流。Among them, v sa , v sb , v sc represent the stator three-phase voltage, isa , isb , isc represent the stator three-phase current, i ra , i rb , i rc represent the rotor three-phase current.
所述步骤2包括以下步骤：Described step 2 comprises the following steps:
步骤2-1：确定定子电压初始偏差信号、定子电流初始偏差信号和转子电流初始偏差信号，有：Step 2-1: Determine the initial deviation signal of the stator voltage, the initial deviation signal of the stator current and the initial deviation signal of the rotor current, there are:
其中，表示α相定子电压初始偏差信号，表示β相定子电压初始偏差信号，表示α相定子电流初始偏差信号，表示β相定子电流初始偏差信号，表示α相转子电流初始偏差信号，表示β相转子电流初始偏差信号；vsα′表示α相同步定子电压，vsβ′表示β相同步定子电压，isα′表示α相同步定子电流，isβ′表示β相同步定子电流irα′表示α相同步转子电流，irβ′表示β相同步转子电流；vsα′、vsβ′、isα′、isβ′、irα′、irβ′的初始值均为0；in, Indicates the initial deviation signal of the α-phase stator voltage, Represents the initial deviation signal of the β-phase stator voltage, Indicates the initial deviation signal of the α-phase stator current, Indicates the initial deviation signal of the β-phase stator current, Indicates the initial deviation signal of the α-phase rotor current, Indicates the initial deviation signal of the β-phase rotor current; v sα ′ represents the α-phase synchronous stator voltage, v sβ ′ represents the β-phase synchronous stator voltage, is α ′ represents the α-phase synchronous stator current, and is β ′ represents the β-phase synchronous stator current i rα ′ represents the α-phase synchronous rotor current, i rβ ′ represents the β-phase synchronous rotor current; the initial values of v sα ′, v sβ ′, i sα ′, i sβ ′, i rα ′, and i rβ ′ are all 0;
步骤2-2：分别传递到积分调节器，估算直流偏量d，积分调节器的积分系数为λ；Step 2-2: Respectively passed to the integral regulator to estimate the DC offset d, and the integral coefficient of the integral regulator is λ;
步骤2-3：分别补偿直流偏量d，即可获取定子电压偏差信号、定子电流偏差信号和转子电流偏差信号；定子电压偏差信号包括α相定子电压偏差信号和β相定子电压偏差信号定子电流偏差信号包括α相定子电流偏差信号和β相定子电流偏差信号转子电流偏差信号包括α相转子电流偏差信号和β相转子电流偏差信号 Step 2-3: By compensating the DC offset d separately, the stator voltage deviation signal, stator current deviation signal and rotor current deviation signal can be obtained; the stator voltage deviation signal includes the α-phase stator voltage deviation signal and β-phase stator voltage deviation signal The stator current deviation signal includes the α-phase stator current deviation signal and β-phase stator current deviation signal The rotor current deviation signal includes the α-phase rotor current deviation signal and β-phase rotor current deviation signal
所述步骤3具体包括以下步骤：Described step 3 specifically comprises the following steps:
步骤3-1：计算vsα′、vsβ′、isα′、isβ′、irα′、irβ′，有：Step 3-1: Calculate v sα ′, v sβ ′, i sα ′, i sβ ′, i rα ′, i rβ ′, there are:
其中，k表示宽带系数，ω′表示谐振角频率，qvsα′表示α相正交滞后定子电压，qvsβ′表示β相正交滞后定子电压，qisα′表示α相正交滞后定子电流，qisβ′表示β相正交滞后定子电流，qirα′表示α相正交滞后转子电流，qirβ′表示β相正交滞后转子电流；Among them, k represents the broadband coefficient, ω′ represents the resonant angular frequency, qv sα ′ represents the α-phase quadrature-lag stator voltage, qv sβ ′ represents the β-phase quadrature-lag stator voltage, qi sα ′ represents the α-phase quadrature-lag stator current, qi sβ ′ represents the β-phase quadrature-lag stator current, qi rα ′ represents the α-phase quadrature-lag rotor current, and qi rβ ′ represents the β-phase quadrature-lag rotor current;
步骤3-2：计算同步定子电压、同步定子电流和同步转子电流，同步定子电压包括同步正序定子电压和同步负序定子电压，同步定子电流包括同步正序定子电流和同步负序定子电流，同步转子电流包括同步正序转子电流和同步负序转子电流，有：Step 3-2: Calculate synchronous stator voltage, synchronous stator current and synchronous rotor current, synchronous stator voltage includes synchronous positive sequence stator voltage and synchronous negative sequence stator voltage, synchronous stator current includes synchronous positive sequence stator current and synchronous negative sequence stator current, Synchronous rotor current includes synchronous positive sequence rotor current and synchronous negative sequence rotor current, which are:
其中，表示α相同步正序定子电压，表示β相同步正序定子电压，表示α相同步负序定子电压，表示β相同步负序定子电压，表示α相同步正序定子电流，表示β相同步正序定子电流，表示α相同步负序定子电流，表示β相同步负序定子电流，表示α相同步正序转子电流，表示β相同步正序转子电流，表示α相同步负序转子电流，表示β相同步负序转子电流；in, Indicates the α-phase synchronous positive sequence stator voltage, Indicates the β-phase synchronous positive sequence stator voltage, Indicates the α-phase synchronous negative-sequence stator voltage, Indicates the β-phase synchronous negative-sequence stator voltage, Indicates the α-phase synchronous positive sequence stator current, Indicates the β-phase synchronous positive sequence stator current, Indicates the α-phase synchronous negative-sequence stator current, Indicates the β-phase synchronous negative-sequence stator current, Indicates the phase α synchronous positive sequence rotor current, Indicates the β-phase synchronous positive sequence rotor current, Indicates the α-phase synchronous negative-sequence rotor current, Indicates the β-phase synchronous negative-sequence rotor current;
步骤3-3：将进行2S/3S变换，得到定子三相正序电压 和定子三相负序电压将进行2S/3S变换，得到定子三相正序电流和定子三相负序电流将 进行2S/3S变换，得到转子三相正序电流和转子三相负序电流 具体有：Step 3-3: Put Carry out 2S/3S conversion to obtain the stator three-phase positive sequence voltage and stator three-phase negative sequence voltage Will Carry out 2S/3S conversion to obtain the stator three-phase positive sequence current and stator three-phase negative sequence current Will Carry out 2S/3S conversion to obtain the three-phase positive sequence current of the rotor and rotor three-phase negative sequence current Specifically:
步骤3-4：将 传递给处理器模块进行处理，从而实现对双馈发电机组的控制。Step 3-4: Put Pass it to the processor module for processing, so as to realize the control of the doubly-fed generator set.
与现有技术相比，本发明的有益效果在于：Compared with prior art, the beneficial effect of the present invention is:
1)本发明针对直流偏量对双馈风电机组锁相环准确性的影响，设计了类似于状态观测器的方法估算出采样信号的直流偏量，并通过闭环控制消除了直流偏量。提出的直流偏量自适应补偿方法，极大地提高了双馈风电机组锁相环的稳定性，成功消除了直流偏量的存在对锁频环稳定性和锁相准确性的影响；1) Aiming at the influence of the DC offset on the accuracy of the phase-locked loop of the DFIG, the present invention designs a method similar to a state observer to estimate the DC offset of the sampling signal, and eliminates the DC offset through closed-loop control. The proposed DC offset adaptive compensation method greatly improves the stability of the phase-locked loop of the DFIG, and successfully eliminates the influence of the DC offset on the stability of the frequency-locked loop and the accuracy of the phase-locked loop;
2)较传统锁相方法在低频段具有较快的衰减作用，在消除直流偏量对锁相环准确性与稳定性影响的同时，增强了锁相环节对低频干扰信号的稳定性，提高了双馈风电机组锁相环在整个频带上的稳定性与准确性。2) Compared with the traditional phase-locking method, it has a faster attenuation effect in the low frequency band. While eliminating the influence of the DC offset on the accuracy and stability of the phase-locked loop, it enhances the stability of the phase-locked link against low-frequency interference signals, and improves the efficiency of the phase-locked loop. The stability and accuracy of the phase-locked loop of the doubly-fed wind turbine over the entire frequency band.
附图说明Description of drawings
图1是本发明实施例中双馈风电机组直流偏量自适应补偿的正负序分离方法流程图；Fig. 1 is a flow chart of a positive and negative sequence separation method for DC offset adaptive compensation of a doubly-fed wind turbine in an embodiment of the present invention;
图2是本发明实施例中三相静止坐标系与两相静止坐标系的相位图；2 is a phase diagram of a three-phase stationary coordinate system and a two-phase stationary coordinate system in an embodiment of the present invention;
图3是本发明实施例中正负序分离原理示意图。Fig. 3 is a schematic diagram of the principle of positive and negative sequence separation in the embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings.
本发明提供一种双馈风电机组直流偏量自适应补偿的正负序分离方法，如图1，所述方法包括以下步骤：The present invention provides a positive and negative sequence separation method for DC bias adaptive compensation of double-fed wind turbines, as shown in Figure 1. The method includes the following steps:
步骤1：采集定子三相电压、定子三相电流和转子三相电流，并进行3S/2S变换；Step 1: Collect stator three-phase voltage, stator three-phase current and rotor three-phase current, and perform 3S/2S conversion;
步骤2：通过积分闭环控制确定定子电压偏差信号、定子电流偏差信号以及转子电流偏差信号；Step 2: Determine the stator voltage deviation signal, stator current deviation signal and rotor current deviation signal through integral closed-loop control;
步骤3：获取同步定子电压、同步定子电流和同步转子电流，并对其进行2S/3S变换。Step 3: Obtain the synchronous stator voltage, synchronous stator current and synchronous rotor current, and perform 2S/3S transformation on them.
所述步骤1具体包括以下步骤：Described step 1 specifically comprises the following steps:
步骤1-1：双馈风电机组正常工作时，通过定子电压传感器、定子电流传感器和转子电流传感器分别采集定子三相电压、定子三相电流和转子三相电流；Step 1-1: When the double-fed wind turbine is working normally, the stator three-phase voltage, stator three-phase current and rotor three-phase current are respectively collected through the stator voltage sensor, stator current sensor and rotor current sensor;
步骤1-2：将定子三相电压、定子三相电流、转子三相电流进行3S/2S变换，得到两相静止坐标系下的定子电压、定子电流和转子电流；定子电压包括α相定子电压vsα和β相定子电压vsβ，定子电流包括α相定子电流isα和β相定子电流isβ，转子电流包括α相转子电流irα和β相转子电流irβ，分别表示为：Step 1-2: Perform 3S/2S transformation on the stator three-phase voltage, stator three-phase current and rotor three-phase current to obtain the stator voltage, stator current and rotor current in the two-phase stationary coordinate system; the stator voltage includes the α-phase stator voltage v sα and β-phase stator voltage v sβ , the stator current includes α-phase stator current is α and β-phase stator current is sβ , and the rotor current includes α-phase rotor current i rα and β-phase rotor current i rβ , expressed as:
其中，vsa、vsb、vsc表示定子三相电压，isa、isb、isc表示定子三相电流，ira、irb、irc表示转子三相电流。Among them, v sa , v sb , v sc represent the stator three-phase voltage, isa , isb , isc represent the stator three-phase current, i ra , i rb , i rc represent the rotor three-phase current.
所述步骤2包括以下步骤：Described step 2 comprises the following steps:
步骤2-1：确定定子电压初始偏差信号、定子电流初始偏差信号和转子电流初始偏差信号，有：Step 2-1: Determine the initial deviation signal of the stator voltage, the initial deviation signal of the stator current and the initial deviation signal of the rotor current, there are:
其中，表示α相定子电压初始偏差信号，表示β相定子电压初始偏差信号，表示α相定子电流初始偏差信号，表示β相定子电流初始偏差信号，表示α相转子电流初始偏差信号，表示β相转子电流初始偏差信号；vsα′表示α相同步定子电压，vsβ′表示β相同步定子电压，isα′表示α相同步定子电流，isβ′表示β相同步定子电流irα′表示α相同步转子电流，irβ′表示β相同步转子电流；vsα′、vsβ′、isα′、isβ′、irα′、irβ′的初始值均为0；in, Indicates the initial deviation signal of the α-phase stator voltage, Represents the initial deviation signal of the β-phase stator voltage, Indicates the initial deviation signal of the α-phase stator current, Indicates the initial deviation signal of the β-phase stator current, Indicates the initial deviation signal of the α-phase rotor current, Indicates the initial deviation signal of the β-phase rotor current; v sα ′ represents the α-phase synchronous stator voltage, v sβ ′ represents the β-phase synchronous stator voltage, is α ′ represents the α-phase synchronous stator current, and is β ′ represents the β-phase synchronous stator current i rα ′ represents the α-phase synchronous rotor current, i rβ ′ represents the β-phase synchronous rotor current; the initial values of v sα ′, v sβ ′, i sα ′, i sβ ′, i rα ′, and i rβ ′ are all 0;
步骤2-2：分别传递到积分调节器，估算直流偏量d，积分调节器的积分系数为λ；Step 2-2: Respectively passed to the integral regulator to estimate the DC offset d, and the integral coefficient of the integral regulator is λ;
步骤2-3：分别补偿直流偏量d，即可获取定子电压偏差信号、定子电流偏差信号和转子电流偏差信号；定子电压偏差信号包括α相定子电压偏差信号和β相定子电压偏差信号定子电流偏差信号包括α相定子电流偏差信号和β相定子电流偏差信号转子电流偏差信号包括α相转子电流偏差信号和β相转子电流偏差信号 Step 2-3: By compensating the DC offset d separately, the stator voltage deviation signal, stator current deviation signal and rotor current deviation signal can be obtained; the stator voltage deviation signal includes the α-phase stator voltage deviation signal and β-phase stator voltage deviation signal The stator current deviation signal includes the α-phase stator current deviation signal and β-phase stator current deviation signal The rotor current deviation signal includes the α-phase rotor current deviation signal and β-phase rotor current deviation signal
所述步骤3具体包括以下步骤：Described step 3 specifically comprises the following steps:
步骤3-1：计算vsα′、vsβ′、isα′、isβ′、irα′、irβ′，有：Step 3-1: Calculate v sα ′, v sβ ′, i sα ′, i sβ ′, i rα ′, i rβ ′, there are:
其中，k表示宽带系数，ω′表示谐振角频率，qvsα′表示α相正交滞后定子电压，qvsβ′表示β相正交滞后定子电压，qisα′表示α相正交滞后定子电流，qisβ′表示β相正交滞后定子电流，qirα′表示α相正交滞后转子电流，qirβ′表示β相正交滞后转子电流；Among them, k represents the broadband coefficient, ω′ represents the resonant angular frequency, qv sα ′ represents the α-phase quadrature-lag stator voltage, qv sβ ′ represents the β-phase quadrature-lag stator voltage, qi sα ′ represents the α-phase quadrature-lag stator current, qi sβ ′ represents the β-phase quadrature-lag stator current, qi rα ′ represents the α-phase quadrature-lag rotor current, and qi rβ ′ represents the β-phase quadrature-lag rotor current;
步骤3-2：计算同步定子电压、同步定子电流和同步转子电流，同步定子电压包括同步正序定子电压和同步负序定子电压，同步定子电流包括同步正序定子电流和同步负序定子电流，同步转子电流包括同步正序转子电流和同步负序转子电流，有：Step 3-2: Calculate synchronous stator voltage, synchronous stator current and synchronous rotor current, synchronous stator voltage includes synchronous positive sequence stator voltage and synchronous negative sequence stator voltage, synchronous stator current includes synchronous positive sequence stator current and synchronous negative sequence stator current, Synchronous rotor current includes synchronous positive sequence rotor current and synchronous negative sequence rotor current, which are:
其中，表示α相同步正序定子电压，表示β相同步正序定子电压，表示α相同步负序定子电压，表示β相同步负序定子电压，表示α相同步正序定子电流，表示β相同步正序定子电流，表示α相同步负序定子电流，表示β相同步负序定子电流，表示α相同步正序转子电流，表示β相同步正序转子电流，表示α相同步负序转子电流，表示β相同步负序转子电流；in, Indicates the α-phase synchronous positive sequence stator voltage, Indicates the β-phase synchronous positive sequence stator voltage, Indicates the α-phase synchronous negative-sequence stator voltage, Indicates the β-phase synchronous negative-sequence stator voltage, Indicates the α-phase synchronous positive sequence stator current, Indicates the β-phase synchronous positive sequence stator current, Indicates the α-phase synchronous negative-sequence stator current, Indicates the β-phase synchronous negative-sequence stator current, Indicates the phase α synchronous positive sequence rotor current, Indicates the β-phase synchronous positive sequence rotor current, Indicates the α-phase synchronous negative-sequence rotor current, Indicates the β-phase synchronous negative-sequence rotor current;
步骤3-3：将进行2S/3S变换，得到定子三相正序电压 和定子三相负序电压将进行2S/3S变换，得到定子三相正序电流和定子三相负序电流将 进行2S/3S变换，得到转子三相正序电流和转子三相负序电流 具体有：Step 3-3: Put Carry out 2S/3S conversion to obtain the stator three-phase positive sequence voltage and stator three-phase negative sequence voltage Will Carry out 2S/3S conversion to obtain the stator three-phase positive sequence current and stator three-phase negative sequence current Will Carry out 2S/3S conversion to obtain the three-phase positive sequence current of the rotor and rotor three-phase negative sequence current Specifically:
步骤3-4：将 传递给处理器模块进行处理，从而实现对双馈发电机组的控制。Step 3-4: Put Pass it to the processor module for processing, so as to realize the control of the doubly-fed generator set.
最后应当说明的是：以上实施例仅用以说明本发明的技术方案而非对其限制，所属领域的普通技术人员参照上述实施例依然可以对本发明的具体实施方式进行修改或者等同替换，这些未脱离本发明精神和范围的任何修改或者等同替换，均在申请待批的本发明的权利要求保护范围之内。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Those of ordinary skill in the art can still modify or equivalently replace the specific implementation methods of the present invention with reference to the above embodiments. Any modifications or equivalent replacements departing from the spirit and scope of the present invention are within the protection scope of the claims of the pending application of the present invention.
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