WO2017028617A1 - 相位角获取方法和系统 - Google Patents

相位角获取方法和系统 Download PDF

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WO2017028617A1
WO2017028617A1 PCT/CN2016/085964 CN2016085964W WO2017028617A1 WO 2017028617 A1 WO2017028617 A1 WO 2017028617A1 CN 2016085964 W CN2016085964 W CN 2016085964W WO 2017028617 A1 WO2017028617 A1 WO 2017028617A1
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phase
input voltage
phase input
voltage
sequence
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PCT/CN2016/085964
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English (en)
French (fr)
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胡余生
郭伟林
李燕
牛高产
陈广辉
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珠海格力节能环保制冷技术研究中心有限公司
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Publication of WO2017028617A1 publication Critical patent/WO2017028617A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/18Indicating phase sequence; Indicating synchronism
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

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  • the invention relates to the field of three-phase controllable rectification, in particular to a phase angle acquisition method and system.
  • phase angle acquisition method it is almost necessary to detect the phase sequence of the input power supply voltage.
  • phase-shift protection measures it is usually first added by adding phase-shift protection measures to facilitate phase-shift protection, and then switching the wiring of the input power supply, thereby making the phase sequence of the input power supply voltage. It is a positive phase sequence.
  • the entire three-phase controlled rectifier system will be confusing, and in serious cases, the entire system will be burnt. This makes the existing phase angle acquisition method less intelligent, less convenient to apply, and has a lower fault tolerance.
  • a phase angle acquisition method provided for the purpose of the present invention includes the following steps:
  • phase sequence of the three-phase input voltage is a positive phase sequence
  • k is a sampling time of the first phase input voltage and the second phase input voltage
  • ⁇ T is an interrupt processing time
  • is an angular frequency of the three-phase input voltage
  • the first phase input voltage and the second phase input voltage are both phase voltages or line voltages.
  • the first phase input voltage and the second phase input voltage are both phase voltages
  • the first phase input voltages respectively collected according to two consecutive sampling moments And the second phase input voltage, identifying a phase sequence of the three-phase input voltage, comprising the following steps:
  • the first phase input voltage is a u-phase input voltage
  • e u (K) is a u-phase input voltage collected at time K
  • e u (K-1) is a u-phase input voltage acquired at time K-1 ;
  • the second phase input voltage is a v-phase input voltage
  • e v (K) is a v-phase input voltage acquired at time K
  • t is a sampling time of the three-phase input voltage.
  • the determining, according to the detected e u (K) and e u (K-1), whether the first phase input voltage is at a zero crossing of a rising edge comprises the following steps:
  • the first phase input voltage is at a zero crossing of the rising edge
  • the first phase input voltage is not at a zero crossing of the rising edge
  • e op is a voltage threshold
  • the e op has a value range of 4V ⁇ e op ⁇ 8V.
  • the identifying the phase sequence of the three-phase input voltage according to the second phase input voltage e v (K) acquired at time K includes the following steps:
  • phase sequence of the three-phase input voltage is identified as a positive phase sequence; if not, the phase sequence of the three-phase input voltage is identified as an inverted sequence.
  • e u is a u-phase input voltage of the three-phase input voltage
  • e v is a v-phase input voltage of the three-phase input voltage
  • e w is a w-phase input voltage of the three-phase input voltage
  • E m is the maximum voltage amplitude of the three-phase input voltage.
  • the present invention also provides a phase angle acquisition system, comprising a voltage acquisition module, a phase sequence identification module and a phase angle acquisition module;
  • the voltage collecting module is configured to collect a first phase input voltage and a second phase input voltage of a three-phase input voltage of the three-phase controlled rectifier system;
  • the phase sequence identification module is configured to identify a phase sequence of the three-phase input voltage according to the first phase input voltage and the second phase input voltage respectively collected at two consecutive sampling moments;
  • the phase angle acquisition module is configured to acquire the three-phase input according to a first correspondence relationship between a voltage vector phase angle and the three-phase input voltage when a phase sequence of the three-phase input voltage is a positive phase sequence
  • the voltage vector phase angle ⁇ (k) of the voltage ⁇ 0 + ⁇ * ⁇ T;
  • the phase angle acquisition module is further configured to acquire the third according to a second correspondence between the voltage vector phase angle and the three-phase voltage when a phase sequence of the three-phase input voltage is an inverted sequence
  • the voltage vector phase angle ⁇ (k) of the phase input voltage - ⁇ 0 - ⁇ * ⁇ T;
  • k is a sampling time of the first phase input voltage and the second phase input voltage
  • ⁇ T is an interrupt processing time
  • is an angular frequency of the three-phase input voltage
  • the phase sequence identification module includes a detection determination sub-module and a phase sequence identification sub-module;
  • the determining submodule is configured to detect the first phase input voltage e u (K) collected at time K when the collected first phase input voltage and the second phase input voltage are phase voltages And the first phase input voltage e u (K-1) acquired at time K-1, and determining the first phase input according to the detected e u (K) and e u (K-1) Whether the voltage is at the zero crossing of the rising edge;
  • the phase sequence identification submodule is configured to, when the detection determination submodule determines that the first phase voltage is at a zero crossing of a rising edge, according to the second phase input voltage e v (K) collected at time K Identifying a phase sequence of the three-phase input voltage;
  • the first phase input voltage is a u-phase input voltage
  • e u (K) is a u-phase input voltage collected at time K
  • e u (K-1) is a u-phase input voltage acquired at time K-1 ;
  • the second phase input voltage is a v-phase input voltage
  • e v (K) is a v-phase input voltage acquired at time K
  • t is a sampling time of the three-phase input voltage.
  • the detection judging module includes a first judging unit
  • e op are satisfied;
  • the first determining unit determines that the first phase input voltage is at a zero crossing of a rising edge
  • the first determining unit determines that the first phase input voltage is not at a zero crossing of the rising edge
  • e op is a voltage threshold
  • the phase sequence identification sub-module includes a second determining unit
  • the second determining unit is configured to determine whether the e v (K) is less than 0;
  • the second determining unit determines that the phase sequence of the three-phase input voltage is a positive phase sequence
  • the second determining unit determines that the phase sequence of the three-phase input voltage is an inverted sequence.
  • the first phase input voltage and the second phase input voltage are respectively collected according to the first phase input voltage and the second phase input voltage of the three-phase input voltage of the three-phase controllable rectification system, and the first phase input voltage and the second phase input voltage are respectively collected according to two consecutive sampling moments.
  • the phase sequence of the three-phase input voltage is identified as a positive phase sequence or a reverse phase sequence, thereby realizing the function of quickly identifying the phase sequence of the three-phase power supply voltage connected to the three-phase controlled rectifier system.
  • the vector phase angle enables accurate acquisition of the voltage vector phase angle in both the positive phase sequence and the reverse phase sequence. And the obtained voltage vector phase angle can be directly applied to the control program of the three-phase controlled rectifier system, Changes to other parts of the control program are required. At the same time, no phase protection is required, and there is no requirement for the wiring of the input power supply voltage of the three-phase controlled rectifier system, which is convenient to use and has a high fault tolerance. Therefore, the existing phase angle acquisition method is effectively solved, and the problem of low intelligence, inconvenient application, and low fault tolerance is solved.
  • Figure 1 is a positive phase sequence diagram of the input supply voltage of a three-phase controlled rectifier system
  • FIG. 2 is an inverted sequence diagram of an input power supply voltage of a three-phase controlled rectifier system
  • FIG. 3 is a flow chart of a specific embodiment of a phase angle acquisition method according to the present invention.
  • FIG. 4 is a schematic diagram showing a first correspondence relationship between a voltage vector phase angle and a three-phase input voltage when a phase sequence of a three-phase input voltage is a positive phase sequence in the phase angle acquisition method of the present invention
  • FIG. 5 is a schematic diagram showing a second correspondence relationship between a voltage vector phase angle and a three-phase input voltage when a phase sequence of a three-phase input voltage is an inverted sequence in the phase angle acquisition method of the present invention
  • FIG. 6 is a flow chart of another embodiment of a phase angle acquisition method according to the present invention.
  • FIG. 7 is a simulation result diagram when a three-phase input voltage is a positive phase sequence when a phase angle acquisition method of the present invention is used to simulate a three-phase controllable rectification system;
  • FIG. 8 is a simulation result diagram when the three-phase input voltage is in a reverse phase when the phase angle acquisition method of the present invention is used to simulate a three-phase controllable rectification system;
  • FIG. 9 is a waveform diagram of a voltage vector phase angle and a two-phase input voltage obtained when the three-phase input voltage is in a positive phase sequence using the phase angle acquisition method of the present invention.
  • FIG. 10 is a waveform diagram of a voltage vector phase angle and a two-phase input voltage obtained when the three-phase input voltage is in an inverted sequence by using the phase angle acquisition method of the present invention
  • FIG. 11 is a schematic structural view of a specific embodiment of a phase angle acquisition system of the present invention.
  • the method includes the following steps:
  • step S100 is executed to collect the first phase input voltage and the second phase input voltage of the three-phase input voltage of the three-phase controlled rectifier system.
  • first phase input voltage and the second phase input voltage of the three-phase input voltages collected therein are described. It can be either a phase voltage or a line voltage.
  • the formula can be converted as follows:
  • e u is the u-phase input voltage of the three-phase input voltage
  • e v is the v-phase input voltage of the three-phase voltage
  • e uv is the line voltage between the u-phase line and the v-phase line of the three-phase input voltage , that is, the vector sum of the u-phase input voltage and the v-phase input voltage in the three-phase input voltage
  • e wu is the line voltage between the w-phase line and the u-phase line of the three-phase input voltage, that is, the w-phase of the three-phase input voltage
  • the three-phase input voltage when it is a phase voltage, it includes a u-phase input voltage, a v-phase input voltage, and a w-phase input voltage.
  • the first phase input voltage in the present invention may be any one of the above phase input voltages, that is, the first phase input voltage disclosed in the present invention may be a u phase input voltage, a v phase input voltage, or a w phase input. Voltage.
  • a u-phase input voltage is used as the first phase input voltage
  • a v-phase input voltage is used as the second phase input voltage as an example.
  • the three-phase input voltage of the three-phase controllable rectification system can also be simultaneously acquired, that is, the first phase input voltage, the second phase input voltage, and the first phase are simultaneously acquired.
  • the three-phase input voltage avoids the process of calculating the third phase input voltage from the collected first phase input voltage and second phase input voltage.
  • any two-phase input voltages of the three-phase input voltage that is, the first phase input voltage and the second phase input voltage
  • first phase input voltage, the second phase input voltage, and the third phase input voltage of the three-phase input voltage obtained by real-time acquisition are sampling values, in order to facilitate calculation, it is necessary to convert the sampled value obtained by the acquisition into actual. Voltage value.
  • the specific conversion formula can be set according to the actual design of the hardware sampling circuit and the type of Central Processing Unit (CPU).
  • step S200 is performed, and the first phase input voltage and the first phase are respectively collected according to two consecutive sampling moments.
  • the two-phase input voltage identifies the phase sequence of the three-phase input voltage.
  • k is the sampling time of the three-phase input voltage
  • ⁇ T is the interrupt processing time
  • is the angular frequency of the input power supply voltage.
  • pi is equal to 3.1415926 radians and converted to an angle value of 180 degrees (degrees).
  • the phase angle acquisition method of the present invention acquires an input power supply voltage of a three-phase controllable rectification system in real time, that is, any two-phase input voltage of a three-phase input voltage or a three-phase input voltage (a first phase input voltage and a second phase input voltage) And, according to the first phase input voltage and the second phase input voltage respectively collected at two consecutive sampling instants, the phase sequence of the three-phase input voltage (ie, the phase sequence of the input power voltage of the three-phase controlled rectifier system) Identification is performed to achieve the purpose of quickly identifying the phase sequence of the three-phase input voltage.
  • the phase angle acquisition method of the present invention has good intelligence, is convenient to use, and has high fault tolerance.
  • the three-phase input voltage of the three-phase controlled rectifier system can be either phase voltage or line voltage
  • the three-phase input voltage is the phase voltage
  • the first phase input voltage is the u-phase input voltage e u
  • the second phase input voltage is the v-phase input voltage e v
  • the third phase input voltage is the w-phase input voltage e w .
  • the phase angle acquisition method of the present invention will be described in more detail.
  • e u (K) is the first phase input voltage collected at time K, that is, the u-phase input voltage collected at time K; e u (K-1) is acquired at time K-1.
  • the first phase input voltage that is, the u-phase input voltage collected at time K-1;
  • e v (K) is the second phase input voltage collected at time K, that is, the v-phase input voltage collected at time K;
  • e v ( K-1) is the second phase input voltage collected at time K-1, that is, the v-phase input voltage collected at time K-1.
  • step S100 real-time collecting any two-phase input voltage of the three-phase controllable rectification system, and obtaining the third-phase input voltage according to the two-phase input voltage, the three-phase controllable rectification system that will be acquired
  • the sampled value of the phase input voltage is converted to the actual voltage value.
  • Step S200 is further performed, according to the first phase input collected according to two consecutive sampling moments
  • the input voltage and the second phase input voltage identify the phase sequence of the three phase input voltage. specific:
  • step S210 the first phase input voltage e u (K) collected at time K and the first phase input voltage e u (K-1) collected at time K-1 are detected, and according to The detected e u (K) and e u (K-1) determine whether the first phase input voltage is at the zero crossing of the rising edge.
  • e op conditions are implemented.
  • "&&" is a logical operation symbol in a computer program language, which is characterized by a relationship of "logical and", that is, equivalent to "and”.
  • e op is a voltage threshold, and its value ranges from 4V ⁇ e op ⁇ 8V.
  • ⁇ (k) is the u-phase input voltage acquired at time K
  • e u (K-1) is the u-phase input voltage acquired at time K-1
  • t is the sampling time of the three-phase input voltage.
  • step S220 when the phase sequence of the three-phase input voltage is identified according to the second phase input voltage e v (K) acquired at time K, the first phase input voltage is at the zero crossing of the rising edge, first The phase sequence of the three-phase input voltage is determined by the magnitude of the phase input voltage and the second phase input voltage.
  • the three-phase input voltage can be directly obtained as Positive phase sequence input (ie, u phase leads v phase 120°, v phase leads w phase 120°).
  • the value of the second phase input voltage e v is positive at this time, as shown in Figure 2, it can be concluded that the three-phase input voltage is an inverted sequence input (ie, u phase lags v phase 120°, v phase lag w phase 120°).
  • E m is the maximum voltage amplitude of the three-phase input voltage
  • is the angular frequency of the three-phase input voltage
  • ⁇ T the interrupt processing time, that is, the angular accumulation time.
  • the u-phase voltage ie, the first-phase input voltage
  • the voltage vector phase angle of the remaining time is followed.
  • the simulation result diagram when the three-phase input voltage is the positive phase sequence and the simulation result when the three-phase input voltage is the reverse sequence are shown. It can be seen from the simulation results that the phase angle acquisition method of the present invention can achieve the function of three-phase controllable rectification regardless of whether the three-phase input voltage is a positive phase sequence or a reverse phase sequence, and the bus voltage can be stably boosted, and the three-phase input voltage is stable. It is basically in phase with the three-phase input current.
  • the measured phase angle angle of the voltage vector obtained by the phase angle acquisition method of the present invention when the three-phase input voltage is in the positive phase sequence and the waveform diagram of the two-phase input voltage and the measured use method are respectively used.
  • the phase angle acquisition method of the invention is a waveform diagram of a voltage vector phase angle and a two-phase input voltage obtained when the three-phase input voltage is in an inverted sequence.
  • the two-phase voltages e u and e v input in the actual measurement are values after being scaled by 180V, so the amplitude of the phase voltage displayed is
  • the line voltage of the three-phase controlled rectifier system can also be directly used, and the processing method is to first convert the line voltage into the UV phase line voltage. (ie, first convert the line voltage to phase voltage), and then obtain the phase. Wherein, the collected line voltage is converted into a UV phase line voltage After that, the phase acquisition process is similar to the above-described phase voltage processing method, and therefore will not be described herein.
  • the present invention also provides a phase angle acquisition system. Since the working principle of the phase angle acquisition system of the present invention is the same as or similar to the principle of the phase angle acquisition method of the present invention, the repetitive points will not be described again.
  • a specific embodiment of the phase angle acquisition system 100 of the present invention includes a voltage acquisition module 110, a phase sequence identification module 120, and a phase angle acquisition module 130.
  • the voltage acquisition module 110 is configured to acquire a first phase input voltage and a second phase input voltage of the three-phase input voltage of the three-phase controlled rectifier system.
  • the phase sequence identification module 120 is configured to identify the phase sequence of the three-phase input voltage according to the first phase input voltage and the second phase input voltage respectively collected at two consecutive sampling instants.
  • k is the sampling time of the first phase input voltage and the second phase input voltage
  • ⁇ T is the interrupt processing time
  • is the angular frequency of the three-phase input voltage
  • the phase sequence identification module 120 includes a detection determination sub-module 121 and a phase sequence identification sub-module 122.
  • the detection judging module 121 is configured to detect the first phase input voltage e u (K) and K- collected at the time K when the first phase input voltage and the second phase input voltage are both phase voltages.
  • the phase sequence identification sub-module 122 is configured to identify the three-phase input voltage according to the second phase input voltage e v (K) collected at the time K when the detection judgment sub-module 121 determines that the first phase voltage is at the zero-crossing point of the rising edge.
  • the first phase input voltage is the u-phase input voltage
  • e u (K) is the u-phase input voltage acquired at time K
  • e u (K-1) is the u-phase input acquired at time K-1.
  • Voltage; the second phase input voltage is the v-phase input voltage, e v (K) is the v-phase input voltage acquired at time K; t is the sampling time of the three-phase input voltage.
  • the detection judging module 121 includes a first judging unit 1210.
  • e op .
  • the first determining unit 1210 determines that the first phase input voltage is at a zero crossing of the rising edge; if not, the first determining unit 1210 determines that the first phase input voltage is not at a zero crossing of the rising edge;
  • e op is a voltage threshold, and its value range may be 4V ⁇ e op ⁇ 8V.
  • the phase sequence identification sub-module 122 includes a second determination unit 1220.
  • the second determining unit 1220 is configured to determine whether e v (K) is less than 0; if yes, the second determining unit 1220 determines that the phase sequence of the three-phase input voltage is a positive phase sequence; if not, the second determining unit 1220 determines The phase sequence of the three-phase input voltage is in reverse phase.

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Abstract

一种相位角获取方法和系统,该方法包括如下步骤:采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压;根据连续两个采样时刻分别采集到的第一相输入电压和第二相输入电压,识别三相输入电压的相序;当三相输入电压的相序为正相序时,根据电压矢量相位角与三相输入电压的第一对应关系,获取电压矢量相位角θ(k)=θ 0+ω*ΔT;当三相输入电压的相序为反相序时,根据电压矢量相位角与三相电压的第二对应关系,获取电压矢量相位角θ(k)=-θ 0-ω*ΔT。其获取的电压矢量相位角可直接应用到系统的控制程序中,不需要进行错相保护,对输入电源电压的接线没有任何要求。有效解决现有的相位角获取方法智能性较低、应用不便捷、且容错率低的问题。

Description

相位角获取方法和系统
相关申请
本发明申请要求2015年08月17日申请的,申请号为201510505584.2,名称为“相位角获取方法和系统”的中国专利申请的优先权,在此将其全文引入作为参考。
技术领域
本发明涉及三相可控整流领域,特别是涉及一种相位角获取方法和系统。
背景技术
在三相可控整流或三相PFC(Power Factor Correction,功率因数校正)系统中,为了使输入电流与输入电压同相位,大部分实现方法中,如:dq解耦双闭环控制、滑模电压控制和混合非线性控制等都需要使用输入电源电压矢量的相位角,因此获取输入电源电压的相位角十分关键。
由于输入电源的相序存在两种相序关系,一种为UVW正相序(参见图1),即:eu=Em cosθ、ev=Em cos(θ-120°)、ew=Em cos(θ-240°),eu为输入电源电压的u相电压,ev为输入电源电压的v相电压,ew为输入电源电压的w相电压;一种为WVU反相序(参见图2),即:eu=Em cosθ、ev=Em cos(θ+120°)、ew=Em cos(θ+240°)。因此现有的相位角获取方法中,几乎都需要检测输入电源电压的相序。同时在检测到由于接线原因造成输入电源电压的相序反相时,通常先通过增加错相保护措施,以便于进行错相保护,然后再调换输入电源的接线,从而使得输入电源电压的相序为正相序。但是,一旦未进行错相保护或保护不及时,则会导致整个三相可控整流系统混乱,严重时甚至会烧毁整个系统。这就使得现有的相位角获取方法智能性较低,应用不便捷,容错率低。
发明内容
基于此,有必要针对现有的相位角获取方法智能性较低、应用不便捷、且容错率低的问题,提供一种相位角获取方法和系统。
为实现本发明目的提供的一种相位角获取方法,包括如下步骤:
采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压;
根据连续两个采样时刻分别采集到的所述第一相输入电压和所述第二相输入电压,识别所述三相输入电压的相序;
当所述三相输入电压的相序为正相序时,根据电压矢量相位角与所述三相输入电压的第一对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=θ0+ω*ΔT;
当所述三相输入电压的相序为反相序时,根据所述电压矢量相位角与所述三相输入电压的第二对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=-θ0-ω*ΔT;
其中,
Figure PCTCN2016085964-appb-000001
k为所述第一相输入电压和所述第二相输入电压的采样时刻,ΔT为中断处理时间,ω为所述三相输入电压的角频率。
在其中一个实施例中,所述第一相输入电压和所述第二相输入电压均为相电压或线电压。
在其中一个实施例中,当采集的所述第一相输入电压和所述第二相输入电压均为相电压时,所述根据连续两个采样时刻分别采集到的所述第一相输入电压和所述第二相输入电压,识别所述三相输入电压的相序,包括如下步骤:
检测K时刻采集到的第一相输入电压eu(K)和K-1时刻采集到的第一相输入电压eu(K-1);
根据检测到的所述eu(K)和所述eu(K-1),判断所述第一相输入电压是否处于上升沿的过零点;
若是,则根据K时刻采集到的所述第二相输入电压ev(K)识别所述三相输入电压的相序;
若否,则直接获取所述电压矢量相位角θ(k)=θ(k)+ωt;
其中,所述第一相输入电压为u相输入电压,eu(K)为K时刻采集到的u相输入电压,eu(K-1)为K-1时刻采集到的u相输入电压;
所述第二相输入电压为v相输入电压,ev(K)为K时刻采集到的v相输入电压;t为所述三相输入电压的采样时间。
在其中一个实施例中,所述根据检测到的所述eu(K)和eu(K-1),判断所述第一相输入电压是否处于上升沿的过零点,包括如下步骤:
判断所述eu(K)是否满足eu(k)>=0且|eu(k)|<=eop,并且判断所述eu(K-1)是否满足eu(k-1)<=0且|eu(k-1)|<=eop
若是,则所述第一相输入电压处于上升沿的过零点;
若否,则所述第一相输入电压未处于上升沿的过零点;
其中,eop为电压阈值。
在其中一个实施例中,所述eop的取值范围为:4V≤eop≤8V。
在其中一个实施例中,所述根据K时刻采集到的所述第二相输入电压ev(K)识别所述三相输入电压的相序,包括如下步骤:
判断所述ev(K)是否小于0;
若是,则识别出所述三相输入电压的相序为正相序;若否,则识别出所述三相输入电压的相序为反相序。
在其中一个实施例中,所述电压矢量相位角与所述三相输入电压的第一对应关系为:eu=Emcosθ、ev=Emcos(θ-120°)、ew=Emcos(θ-240°);
所述电压矢量相位角与所述三相输入电压的第二对应关系为:eu=Emcosθ、ev=Emcos(θ+120°)、ew=Emcos(θ+240°);
其中,eu为所述三相输入电压的u相输入电压,ev为所述三相输入电压的v相输入电压,ew为所述三相输入电压的w相输入电压;
Em为所述三相输入电压的最大电压幅值。
相应的,基于同一发明构思,本发明还提供了一种相位角获取系统,包括电压采集模块、相序识别模块和相位角获取模块;其中
所述电压采集模块,被配置为采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压;
所述相序识别模块,被配置为根据连续两个采样时刻分别采集到的所述第一相输入电压和所述第二相输入电压,识别所述三相输入电压的相序;
所述相位角获取模块,被配置为当所述三相输入电压的相序为正相序时,根据电压矢量相位角与所述三相输入电压的第一对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=θ0+ω*ΔT;
所述相位角获取模块,还被配置为当所述三相输入电压的相序为反相序时,根据所述电压矢量相位角与所述三相电压的第二对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=-θ0-ω*ΔT;
其中,
Figure PCTCN2016085964-appb-000002
k为所述第一相输入电压和所述第二相输入电压的采样时刻,ΔT为中断处理时间,ω为所述三相输入电压的角频率。
在其中一个实施例中,所述相序识别模块包括检测判断子模块和相序识别子模块;其中
所述判断子模块,被配置为当采集的所述第一相输入电压和所述第二相输入电压均为相 电压时,检测K时刻采集到的所述第一相输入电压eu(K)和K-1时刻采集到的第一相输入电压eu(K-1),并根据检测到的所述eu(K)和eu(K-1),判断所述第一相输入电压是否处于上升沿的过零点;
所述相序识别子模块,被配置为当所述检测判断子模块判断所述第一相电压处于上升沿的过零点时,根据K时刻采集到的所述第二相输入电压ev(K)识别所述三相输入电压的相序;
所述相位角获取模块,还被配置为当所述检测判断子模块判断所述第一相电压未处于上升沿的过零点时,直接获取所述电压矢量相位角θ(k)=θ(k)+ωt;
其中,所述第一相输入电压为u相输入电压,eu(K)为K时刻采集到的u相输入电压,eu(K-1)为K-1时刻采集到的u相输入电压;
所述第二相输入电压为v相输入电压,ev(K)为K时刻采集到的v相输入电压;t为所述三相输入电压的采样时间。
在其中一个实施例中,所述检测判断子模块包括第一判断单元;
所述第一判断单元,被配置为判断所述eu(K)是否满足eu(k)>=0且|eu(k)|<=eop,并且判断所述eu(K-1)是否满足eu(k-1)<=0且|eu(k-1)|<=eop
若是,则所述第一判断单元判断所述第一相输入电压处于上升沿的过零点;
若否,则所述第一判断单元判断所述第一相输入电压未处于上升沿的过零点;
其中,eop为电压阈值。
在其中一个实施例中,所述相序识别子模块包括第二判断单元;
所述第二判断单元,被配置为判断所述ev(K)是否小于0;
若是,则所述第二判断单元判断所述三相输入电压的相序为正相序;
若否,则所述第二判断单元判断所述三相输入电压的相序为反相序。
上述相位角获取方法的有益效果:
其通过采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压,并根据连续两个采样时刻分别采集到的第一相输入电压和第二相输入电压,识别出三相输入电压的相序为正相序或反相序,从而实现了快速识别三相可控整流系统所接三相电源电压的相序的功能。并且,当识别出三相输入电压的相序后,按照识别出的三相输入电压的相序,分别根据不同的电压矢量相位角与三相输入电压的对应关系计算得到三相输入电压的电压矢量相位角,使得在三相输入电压无论是在正相序还是在反相序下都能够准确的获取电压矢量相位角。并且其获取到的电压矢量相位角可直接应用到三相可控整流系统的控制程序中,不 需要对控制程序的其他部分进行更改。同时也不需要进行错相保护,对三相可控整流系统的输入电源电压的接线没有任何要求,使用便捷,容错率高。因此有效地解决了现有的相位角获取方法智能性较低、应用不便捷、且容错率低的问题。
附图说明
图1为三相可控整流系统的输入电源电压的正相序图;
图2为三相可控整流系统的输入电源电压的反相序图;
图3为本发明的相位角获取方法一具体实施例流程图;
图4为本发明的相位角获取方法中,三相输入电压的相序为正相序时电压矢量相位角与三相输入电压的第一对应关系示意图;
图5为本发明的相位角获取方法中,三相输入电压的相序为反相序时电压矢量相位角与三相输入电压的第二对应关系示意图;
图6为本发明的相位角获取方法另一具体实施例流程图;
图7为采用本发明的相位角获取方法进行三相可控整流系统仿真时,三相输入电压为正相序时的仿真结果图;
图8为采用本发明的相位角获取方法进行三相可控整流系统仿真时,三相输入电压为反相序时的仿真结果图;
图9为实测的采用本发明的相位角获取方法在三相输入电压为正相序时获取的电压矢量相位角与两相输入电压的波形图;
图10为实测的采用本发明的相位角获取方法在三相输入电压为反相序时获取的电压矢量相位角与两相输入电压的波形图;
图11为本发明的相位角获取系统的一具体实施例的结构示意图。
具体实施方式
为使本发明技术方案更加清楚,以下结合附图及具体实施例对本发明做进一步详细说明。
参见图3,作为本发明的用于三相可控整流系统中的相位角获取方法,其包括如下步骤:
首先,执行步骤S100,采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压。
此处,需要说明的是,其采集到的三相输入电压中的第一相输入电压和第二相输入电压 既可为相电压,也可为线电压。当采集到的第一相输入电压和第二相输入电压为线电压时,可通过如下转换公式:
Figure PCTCN2016085964-appb-000003
将线电压转换为相电压。其中,eu为三相输入电压中的u相输入电压;ev为三相电压中的v相输入电压;euv则为三相输入电压中u相线与v相线之间的线电压,即三相输入电压中u相输入电压与v相输入电压的矢量和;ewu则为三相输入电压中w相线与u相线之间的线电压,即三相输入电压中w相输入电压与u相输入电压的矢量和。
应当指出的是,三相输入电压为相电压时,其包括u相输入电压、v相输入电压和w相输入电压。本发明中的第一相输入电压可为上述任一相输入电压,即本发明公开的第一相输入电压即可为u相输入电压、也可为v相输入电压,还可为w相输入电压。以下为便于描述本发明的技术方案,以u相输入电压作为第一相输入电压,v相输入电压作为第二相输入电压为例进行说明。
另外,作为本发明的相位角获取方法的另一种可实施方式,也可同时采集三相可控整流系统的三相输入电压,即同时采集第一相输入电压、第二相输入电压和第三相输入电压,从而避免通过采集到的第一相输入电压和第二相输入电压计算得到第三相输入电压的过程。但同时采集三相输入电压中的每一相输入电压时,需要增加硬件电路成本。
因此,在实际采样中为减少硬件成本,其优选为采集三相输入电压中的任意两相输入电压,即第一相输入电压和第二相输入电压,第三相输入电压通过公式eu+ev+ew=0计算即可获得。
另外,由于实时采集获得的三相输入电压中的第一相输入电压、第二相输入电压和第三相输入电压均为采样值,为便于计算,需要将采集获得的采样值换算转化为实际的电压值。而具体的换算公式则可根据实际所设计的硬件采样电路和中央处理器(Central Processing Unit,CPU)的类型进行设置。
待采集到三相输入电压或任意两相输入电压(即第一相输入电压和第二相输入电压)后,执行步骤S200,根据连续两个采样时刻分别采集到的第一相输入电压和第二相输入电压,识别三相输入电压的相序。进而,在识别出三相输入电压的相序为正相序时,执行步骤S300,根据电压矢量相位角与三相输入电压的第一对应关系(参见图4),获取电压矢量相位角为 θ(k)=θ0+ω*ΔT。
在识别出三相输入电压的相序为反相序时,则执行步骤S400,根据电压矢量相位角与三相输入电压的第二对应关系(参见图5),获取电压矢量相位角θ(k)=-θ0-ω*ΔT。
其中,需要说明的是,
Figure PCTCN2016085964-appb-000004
k为三相输入电压的采样时刻,ΔT为中断处理时间,ω为输入电源电压的角频率。根据本领域公知常识可知,pi等于3.1415926弧度,转换成角度值则为180°(度)。
本发明的相位角获取方法通过实时采集三相可控整流系统的输入电源电压,即三相输入电压或三相输入电压中的任意两相输入电压(第一相输入电压和第二相输入电压),进而根据连续两个采样时刻分别采集到的第一相输入电压和第二相输入电压,先对三相输入电压的相序(即三相可控整流系统的输入电源电压的相序)进行识别,从而实现快速识别三相输入电压的相序的目的。然后再按照识别出的三相输入电压的正反相序,分别采用不同的电压矢量相位角与三相输入电压的对应关系准确的计算出三相输入电压的电压矢量相位角。其既实现了快速识别三相输入电压的相序的目的,同时还通过根据识别出的三相输入电压的相序,分别采用不同的计算方式计算出电压矢量相位角的功能。从而实现了无论三相输入电压的相序为正相序还是反相序,都能够准确的获得电压矢量相位角的目的。因此不需要进行错相保护,其获取的电压矢量相位角可直接应用到三相可控整流系统的控制程序中,而无需对控制程序的其他部分进行任何更改。因此,本发明的相位角获取方法具有良好的智能性,使用便捷且容错率高。
由于实时采集三相可控整流系统的三相输入电压既可为相电压也可为线电压,因此以下便以三相输入电压为相电压,且第一相输入电压为u相输入电压eu,第二相输入电压为v相输入电压ev,第三相输入电压为w相输入电压ew为例,对本发明的相位角获取方法进行更为清楚详细的说明。
其中,应当指出的是,eu(K)为K时刻采集到的第一相输入电压,即K时刻采集到的u相输入电压;eu(K-1)为K-1时刻采集到的第一相输入电压,即K-1时刻采集到的u相输入电压;ev(K)为K时刻采集到的第二相输入电压,即K时刻采集到的v相输入电压;ev(K-1)为K-1时刻采集到的第二相输入电压,即K-1时刻采集到的v相输入电压。
当通过执行步骤S100,实时采集到三相可控整流系统的任意两相输入电压,并根据该两相输入电压通过计算得到第三相输入电压后,将获取的三相可控整流系统的三相输入电压的采样值换算为实际的电压值。进而执行步骤S200,根据连续两个采样时刻采集到的第一相输 入电压和第二相输入电压识别三相输入电压的相序。具体的:
参见图6,首先,通过执行步骤S210,检测K时刻采集到的第一相输入电压eu(K)和K-1时刻采集到的第一相输入电压eu(K-1),并根据检测到的eu(K)和eu(K-1),判断第一相输入电压是否处于上升沿的过零点。
其中,作为本发明的相位角获取方法的一具体实施例,根据检测到的eu(K)和eu(K-1),判断第一相输入电压是否处于上升沿的过零点,具体可通过判断eu(K)和eu(K-1)是否满足eu(k)>=0&&|eu(k)|<=eop且eu(k-1)<=0&&|eu(k-1)|<=eop条件来实现。其中,“&&”为计算机程序语言中的逻辑运算符号,其表征为“逻辑与”的关系,即相当于“并且”的意思。
也就是说,通过判断eu(K)是否满足eu(k)>=0且|eu(k)|<=eop,并且判断eu(K-1)是否满足eu(k-1)<=0且|eu(k-1)|<=eop;如果判断出eu(K)满足上述eu(k)>=0且|eu(k)|<=eop条件,且eu(K-1)也同时满足上述eu(k-1)<=0且|eu(k-1)|<=eop条件,则可判断出第一相输入电压处于上升沿的过零点。如果判断出eu(K)不满足上述eu(k)>=0且|eu(k)|<=eop条件,和/或eu(K-1)也不满足上述eu(k-1)<=0且|eu(k-1)|<=eop条件,则可直接判断出第一相输入电压未处于上升沿的过零点。
其中,需要说明的是,eop为电压阈值,其取值范围为4V≤eop≤8V。
当判断出第一相输入电压处于上升沿的过零点时,则再通过执行步骤S220,根据K时刻采集到的第二相输入电压ev(K)识别三相输入电压的相序。当判断出第一相输入电压未处于上升沿的过零点时,则执行步骤S500,直接获取电压矢量相位角θ(k)=θ(k)+ωt。需要说明的是,图6中θ(k)+=ωt中的“+=”为计算机程序语言中的赋值运算符,即将θ(k)+ωt的值再赋值给θ(k)。其中,eu(K)为K时刻采集到的u相输入电压,eu(K-1)为K-1时刻采集到的u相输入电压,t为三相输入电压的采样时间。
进一步的,步骤S220,根据K时刻采集到的第二相输入电压ev(K)识别三相输入电压的相序时,其可通过第一相输入电压处于上升沿的过零点时,第一相输入电压与第二相输入电压的幅值来判断三相输入电压的相序。
具体的,当第一相输入电压eu处于上升沿的过零点时,参见图1,如果此时第二相输入电压ev的取值为负值,则可直接得出三相输入电压为正相序输入(即u相超前v相120°,v相超前w相120°)。同理,如果此时第二相输入电压ev的取值为正值,参见图2,则可得出三相输入电压为反相序输入(即u相滞后v相120°,v相滞后w相120°)。
因此,参见图6,当判断出第一相输入电压处于上升沿的过零点时,可通过执行步骤221,判断ev(K)是否小于0。
若是,则执行步骤S300,判断出三相输入电压的相序为正相序,进而按照三相输入电压的相序为正相序时电压矢量相位角与三相输入电压的第一对应关系,参见图4,即eu=Emcosθ、ev=Emcos(θ-120°)、ew=Emcos(θ-240°)获取电压矢量相位角。当u相电压(即第一相输入电压)处于上升沿的过零点时,此时电压矢量相位角θ(k)=θ00=-90°),其余时刻的电压矢量相位角可按照三相输入电压的频率(一般可通过硬件捕获或其他方法获得,通常中国的三相输入电压的频率在50HZ附近)进行累加。最终获取的电压矢量相位角为θ(k)=θ0+ω*ΔT。其中,Em为三相输入电压的最大电压幅值,ω为三相输入电压的角频率,ΔT为中断处理时间,也即角度累加时间。
若否,则执行步骤S400,判断出三相输入电压的相序为反相序。进而按照三相输入电压的相序为反相序时,电压矢量相位角与三相输入电压的第二对应关系,参见图5,即eu=Emcosθ、ev=Emcos(θ+120°)、ew=Emcos(θ+240°)获取电压矢量相位角。当u相电压(即第一相输入电压)处于上升沿的过零点时,此时相位角θ(k)=-θ00=-90°),其余时刻的电压矢量相位角则按照三相输入电压的频率进行累减。最终获取的电压矢量相位角θ(k)=-θ0-ω*ΔT。其中,Em为三相输入电压的最大电压幅值,ω为三相输入电压的角频率,ΔT为中断处理时间,也即角度累减时间。
参见图7和图8,分别为采用如上方法进行三相可控整流系统仿真时,三相输入电压为正相序时的仿真结果图和三相输入电压为反相序时的仿真结果图。从仿真结果可看出采用本发明的相位角获取方法,无论三相输入电压是正相序还是反相序,均能达到三相可控整流的功能,母线电压能稳定升压,三相输入电压与三相输入电流基本同相位。
并且,参见图9和图10,分别为实测的采用本发明的相位角获取方法在三相输入电压为正相序时获取的电压矢量相位角与两相输入电压的波形图和实测的采用本发明的相位角获取方法在三相输入电压为反相序时获取的电压矢量相位角与两相输入电压的波形图。其中,在该实测中输入的两相电压eu、ev均是按180V定标后的值,因此显示的相电压幅值为
Figure PCTCN2016085964-appb-000005
应当指出的时,采用上述任一种相位角获取方法进行相位角的计算时,也可以直接使用三相可控整流系统的线电压,其处理的方法是先将线电压转化为UV相线电压(即首先将线电压转化为相电压),然后再进行相位的获取。其中,将采集到的线电压转化为UV相线电压 之后,进行相位的获取过程与上述采用相电压的处理方法相似,因此此处不再赘述。
同时,本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通过计算机程序指令及相关的硬件电路来完成,所述的程序可存储于一计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。其中,所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory,ROM)或随机存储记忆体(Random Access Memory,RAM)等。因此,为实现上述任一种相位角获取方法,相应的,本发明还提供了一种相位角获取系统。由于本发明的相位角获取系统的工作原理与本发明的相位角获取方法原理相同或相似,因此重复之处不再赘述。
参见图11,作为本发明的相位角获取系统100的一具体实施例,其包括电压采集模块110、相序识别模块120和相位角获取模块130。其中,电压采集模块110,被配置为采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压。相序识别模块120,被配置为根据连续两个采样时刻分别采集到的第一相输入电压和第二相输入电压,识别三相输入电压的相序。相位角获取模块130,被配置为当三相输入电压的相序为正相序时,根据电压矢量相位角与三相输入电压的第一对应关系,获取三相输入电压的电压矢量相位角θ(k)=θ0+ω*ΔT。相位角获取模块130,还被配置为当三相输入电压的相序为反相序时,根据电压矢量相位角与三相电压的第二对应关系,获取三相输入电压的电压矢量相位角θ(k)=-θ0-ω*ΔT。
需要说明的是,
Figure PCTCN2016085964-appb-000006
k为第一相输入电压和第二相输入电压的采样时刻,ΔT为中断处理时间,ω为三相输入电压的角频率。
在其中一个实施例中,相序识别模块120包括检测判断子模块121和相序识别子模块122。其中,检测判断子模块121,被配置为当采集的第一相输入电压和第二相输入电压均为相电压时,检测K时刻采集到的第一相输入电压eu(K)和K-1时刻采集到的第一相输入电压eu(K-1),并根据检测到的eu(K)和eu(K-1),判断第一相输入电压是否处于上升沿的过零点。相序识别子模块122,被配置为当检测判断子模块121判断第一相电压处于上升沿的过零点时,根据K时刻采集到的第二相输入电压ev(K)识别三相输入电压的相序。相应的,相位角获取模块130,还被配置为当检测判断子模块121判断第一相电压未处于上升沿的过零点时,直接获取电压矢量相位角θ(k)=θ(k)+ωt。
应当指出的是,第一相输入电压为u相输入电压,eu(K)为K时刻采集到的u相输入电压,eu(K-1)为K-1时刻采集到的u相输入电压;第二相输入电压为v相输入电压,ev(K) 为K时刻采集到的v相输入电压;t为三相输入电压的采样时间。
进一步的,检测判断子模块121包括第一判断单元1210。第一判断单元1210,被配置为判断eu(K)是否满足eu(k)>=0且|eu(k)|<=eop,并且判断eu(K-1)是否满足eu(k-1)<=0且|eu(k-1)|<=eop。若是,则第一判断单元1210判断所述第一相输入电压处于上升沿的过零点;若否,则所述第一判断单元1210判断所述第一相输入电压未处于上升沿的过零点;其中,eop为电压阈值,其取值范围可为4V≤eop≤8V。
更进一步的,相序识别子模块122包括第二判断单元1220。第二判断单元1220,被配置为判断ev(K)是否小于0;若是,则第二判断单元1220判断三相输入电压的相序为正相序;若否,则第二判断单元1220判断三相输入电压的相序为反相序。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对本发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (11)

  1. 一种相位角获取方法,其特征在于,包括如下步骤:
    采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压;
    根据连续两个采样时刻分别采集到的所述第一相输入电压和所述第二相输入电压,识别所述三相输入电压的相序;
    当所述三相输入电压的相序为正相序时,根据电压矢量相位角与所述三相输入电压的第一对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=θ0+ω*ΔT;
    当所述三相输入电压的相序为反相序时,根据所述电压矢量相位角与所述三相输入电压的第二对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=-θ0-ω*ΔT;
    其中,
    Figure PCTCN2016085964-appb-100001
    k为所述第一相输入电压和所述第二相输入电压的采样时刻,ΔT为中断处理时间,ω为所述三相输入电压的角频率。
  2. 根据权利要求1所述的相位角获取方法,其特征在于,所述第一相输入电压和所述第二相输入电压均为相电压或线电压。
  3. 根据权利要求1或2所述的相位角获取方法,其特征在于,当采集的所述第一相输入电压和所述第二相输入电压均为相电压时,所述根据连续两个采样时刻分别采集到的所述第一相输入电压和所述第二相输入电压,识别所述三相输入电压的相序,包括如下步骤:
    检测K时刻采集到的第一相输入电压eu(K)和K-1时刻采集到的第一相输入电压eu(K-1);
    根据检测到的所述eu(K)和所述eu(K-1),判断所述第一相输入电压是否处于上升沿的过零点;
    若是,则根据K时刻采集到的第二相输入电压ev(K)识别所述三相输入电压的相序;
    若否,则直接获取所述电压矢量相位角θ(k)=θ(k)+ωt;
    其中,所述第一相输入电压为u相输入电压,eu(K)为K时刻采集到的u相输入电压,eu(K-1)为K-1时刻采集到的u相输入电压;
    所述第二相输入电压为v相输入电压,ev(K)为K时刻采集到的v相输入电压;t为所述三相输入电压的采样时间。
  4. 根据权利要求3所述的相位角获取方法,其特征在于,所述根据检测到的所述eu(K) 和所述eu(K-1),判断所述第一相输入电压是否处于上升沿的过零点,包括如下步骤:
    判断所述eu(K)是否满足eu(k)>=0且|eu(k)|<=eop,并且判断所述eu(K-1)是否满足eu(k-1)<=0且|eu(k-1)|<=eop
    若是,则所述第一相输入电压处于上升沿的过零点;
    若否,则所述第一相输入电压未处于上升沿的过零点;
    其中,eop为电压阈值。
  5. 根据权利要求4所述的相位角获取方法,其特征在于,所述eop的取值范围为:4V≤eop≤8V。
  6. 根据权利要求3所述的相位角获取方法,其特征在于,所述根据K时刻采集到的第二相输入电压ev(K)识别所述三相输入电压的相序,包括如下步骤:
    判断所述ev(K)是否小于0;
    若是,则识别出所述三相输入电压的相序为正相序;若否,则识别出所述三相输入电压的相序为反相序。
  7. 根据权利要求1所述的相位角获取方法,其特征在于,所述电压矢量相位角与所述三相输入电压的第一对应关系为:eu=Emcosθ、ev=Emcos(θ-1200)、ew=Emcos(θ-2400);
    所述电压矢量相位角与所述三相输入电压的第二对应关系为:eu=Emcosθ、ev=Emcos(θ+1200)、ew=Emcos(θ+2400);
    其中,eu为所述三相输入电压的u相输入电压,ev为所述三相输入电压的v相输入电压,ew为所述三相输入电压的w相输入电压;
    Em为所述三相输入电压的最大电压幅值。
  8. 一种相位角获取系统(100),其特征在于,包括电压采集模块(110)、相序识别模块(120)和相位角获取模块(130);其中
    所述电压采集模块(110),被配置为采集三相可控整流系统的三相输入电压中的第一相输入电压和第二相输入电压;
    所述相序识别模块(120),被配置为根据连续两个采样时刻分别采集到的所述第一相输入电压和所述第二相输入电压,识别所述三相输入电压的相序;
    所述相位角获取模块(130),被配置为当所述三相输入电压的相序为正相序时,根据电压矢量相位角与所述三相输入电压的第一对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=θ0+ω*ΔT;
    所述相位角获取模块(130),还被配置为当所述三相输入电压的相序为反相序时,根据所述电压矢量相位角与所述三相电压的第二对应关系,获取所述三相输入电压的所述电压矢量相位角θ(k)=-θ0-ω*ΔT;
    其中,
    Figure PCTCN2016085964-appb-100002
    k为所述第一相输入电压和所述第二相输入电压的采样时刻,ΔT为中断处理时间,ω为所述三相输入电压的角频率。
  9. 根据权利要求8所述的相位角获取系统(100),其特征在于,所述相序识别模块(120)包括检测判断子模块(121)和相序识别子模块(122);其中
    所述检测判断子模块(121),被配置为当采集的所述第一相输入电压和所述第二相输入电压均为相电压时,检测K时刻采集到的第一相输入电压eu(K)和K-1时刻采集到的第一相输入电压eu(K-1),并根据检测到的所述eu(K)和所述eu(K-1),判断所述第一相输入电压是否处于上升沿的过零点;
    所述相序识别子模块(122),被配置为当所述检测判断子模块(121)判断所述第一相电压处于上升沿的过零点时,根据K时刻采集到的所述第二相输入电压ev(K)识别所述三相输入电压的相序;
    所述相位角获取模块(130),还被配置为当所述检测判断子模块(121)判断所述第一相电压未处于上升沿的过零点时,直接获取所述电压矢量相位角θ(k)=θ(k)+ωt;
    其中,所述第一相输入电压为u相输入电压,eu(K)为K时刻采集到的u相输入电压,eu(K-1)为K-1时刻采集到的u相输入电压;
    所述第二项输入电压为v相输入电压,ev(K)为K时刻采集到的v相输入电压;t为所述三相输入电压的采样时间。
  10. 根据权利要求9所述的相位角获取系统(100),其特征在于,所述检测判断子模块(121)包括第一判断单元(1210);
    所述第一判断单元(1210),被配置为判断所述eu(K)是否满足eu(k)>=0且|eu(k)|<=eop,并且判断所述eu(K-1)是否满足eu(k-1)<=0且|eu(k-1)|<=eop
    若是,则所述第一判断单元(1210)判断所述第一相输入电压处于上升沿的过零点;
    若否,则所述第一判断单元(1210)判断所述第一相输入电压未处于上升沿的过零点;
    其中,eop为电压阈值。
  11. 根据权利要求9所述的相位角获取系统(100),其特征在于,所述相序识别子模块(122)包括第二判断单元(1220);
    所述第二判断单元(1220),被配置为判断所述ev(K)是否小于0;
    若是,则所述第二判断单元(1220)判断所述三相输入电压的相序为正相序;
    若否,则所述第二判断单元(1220)判断所述三相输入电压的相序为反相序。
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