CN104360120A - Real-time waveform display method with low communication bandwidth requirement - Google Patents
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Abstract
本发明公开了一种低通讯带宽要求的实时波形显示方法，该方法事先在波形接收及波形发送端设置好现场电气量波形的录波量周期性时间变化标准参考函数，当每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在每个时刻的值的差值≤预设的误差绝对值时，换流站控制系统的录波发送端不向录波接收端传输现场电气量波形的实测录波量，换流站控制系统的录波接收端按照预设的现场电气量波形的录波量周期性时间变化函数标准参考值进行数值图形化显示；否则，进行录波实测数据的传输，波形接收端按照接收的录波实测数值进行波形显示，这样能尽可能的减少波形数据的传输。
The invention discloses a real-time waveform display method with low communication bandwidth requirements. In the method, the standard reference function of the periodical time change of the recorded wave quantity of the on-site electrical quantity waveform is set in advance at the waveform receiving and waveform sending ends. When the scene at each moment When the difference between the measured recorded wave quantity of the electrical quantity waveform and the above-mentioned corresponding recorded wave quantity time-varying standard reference function value at each moment ≤ the preset error absolute value, the recorded wave sending end of the converter station control system will not send The wave recording receiving end transmits the measured wave volume of the on-site electrical quantity waveform, and the wave recording receiving end of the converter station control system performs numerical graphical display according to the preset standard reference value of the periodic time variation function of the field electric quantity wave form ; Otherwise, transmit the measured data of the wave recording, and the waveform receiving end will display the waveform according to the measured value of the wave recording received, so that the transmission of the wave data can be reduced as much as possible.
Description
技术领域technical field
本发明涉及自动化设备波形数据传输及显示技术领域，具体地指一种低通讯带宽要求的实时波形显示方法。The invention relates to the technical field of waveform data transmission and display of automation equipment, in particular to a real-time waveform display method with low communication bandwidth requirements.
背景技术Background technique
目前电力系统领域，波形的实时显示主要依赖于现场采集单元对数据进行高速采集，再通过高速通信总线将数据传回后台，后台接收到数据后将数据图形化显示，形成实时波形。由于波形数据量大且需要完成实时显示功能，故需占用较大的通信带宽。在一般情况下电力系统的现场通信总线均为复用，实时波形传输占用大量带宽后，其他设备的正常通信功能会受到影响，造成现场电力自动化设备工作异常甚至故障。At present, in the power system field, the real-time display of waveforms mainly relies on the on-site acquisition unit to collect data at high speed, and then transmit the data back to the background through the high-speed communication bus. After receiving the data, the background displays the data graphically to form a real-time waveform. Due to the large amount of waveform data and the need to complete the real-time display function, it needs to occupy a large communication bandwidth. In general, the field communication bus of the power system is multiplexed. After the real-time waveform transmission occupies a large amount of bandwidth, the normal communication function of other equipment will be affected, resulting in abnormal operation or even failure of the field power automation equipment.
发明内容Contents of the invention
本发明的目的就是要提供一种低通讯带宽要求的实时波形显示方法，该方法能大幅减轻电力系统现场总线的通讯压力。The purpose of the present invention is to provide a real-time waveform display method with low communication bandwidth requirements, which can greatly reduce the communication pressure of the field bus of the power system.
为实现此目的，本发明所设计的低通讯带宽要求的实时波形显示方法，其特征在于，它包括如下步骤：To achieve this goal, the real-time waveform display method of the low communication bandwidth requirement designed by the present invention is characterized in that it comprises the following steps:
步骤1：换流站控制系统的采样设备获取换流站内电力一次设备、电力二次设备和电力辅助设备中需要显示的现场电气量波形的实测录波量；Step 1: The sampling equipment of the converter station control system obtains the measured and recorded waves of the on-site electrical waveforms that need to be displayed in the primary power equipment, power secondary equipment and power auxiliary equipment in the converter station;
步骤2：根据设备厂家资料或技术标准获取换流站内电力一次设备、电力二次设备和电力辅助设备中与上述需要显示的现场电气量波形的实测录波量对应的录波量时间变化标准参考函数，如上述录波量时间变化标准参考函数为周期性函数，则转到步骤3；如上述录波量时间变化标准参考函数为非周期性函数，则转到步骤4；Step 2: According to the equipment manufacturer's information or technical standards, obtain the standard reference for the time change of the recorded wave volume corresponding to the measured recorded wave volume of the above-mentioned on-site electric quantity waveform that needs to be displayed in the power primary equipment, power secondary equipment, and power auxiliary equipment in the converter station function, if the above-mentioned standard reference function of the time change of wave recording volume is a periodic function, then go to step 3; if the above-mentioned standard reference function of time change of wave recording volume is a non-periodic function, then go to step 4;
步骤3：将上述录波量周期性时间变化标准参考函数录入到换流站控制系统的录波发送端和录波接收端，将每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值进行比较，如果每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值的差值≤预设的误差绝对值，则换流站控制系统的录波发送端不向录波接收端传输步骤1中获取的现场电气量波形的实测录波量，换流站控制系统的录波接收端按照预设的现场电气量波形的录波量周期性时间变化标准参考函数进行数值图形化显示，完成波形实时显示功能；Step 3: Enter the above standard reference function of the periodic time change of the recorded wave volume into the wave recording sending end and the wave recording receiving end of the converter station control system, and compare the measured wave recording volume of the on-site electrical quantity waveform at each moment with the above corresponding The value of the standard reference function of the time change of the recorded wave volume at the corresponding time is compared. value ≤ preset error absolute value, the wave recording sending end of the converter station control system will not transmit the measured wave recording volume of the on-site electric quantity waveform obtained in step 1 to the wave recording receiving end, and the wave recording of the converter station control system The receiving end performs numerical graphical display according to the preset standard reference function of the periodic time change of the recorded wave volume of the on-site electric quantity waveform, and completes the real-time display function of the waveform;
如果有一个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值的差值＞预设的误差绝对值，则换流站控制系统的录波发送端向录波接收端传输步骤1中获取的现场电气量波形的实测录波量，换流站控制系统的录波接收端按接收到的现场电气量波形的实测录波量进行数值图形化显示，完成波形实时显示功能；If there is a difference between the measured wave volume of the on-site electrical quantity waveform at a moment and the value of the above-mentioned corresponding standard reference function of wave volume time change at the corresponding moment > the preset error absolute value, then the recorded wave volume of the converter station control system The wave sending end transmits the actual measured wave volume of the on-site electrical quantity waveform obtained in step 1 to the wave recording receiving end, and the wave recording receiving end of the converter station control system performs numerical graphics according to the received actual measured wave volume of the on-site electrical quantity waveform Real-time display of waveform is completed;
步骤4：换流站控制系统的录波发送端向录波接收端直接传输步骤1中获取的现场电气量波形的实测录波量，换流站控制系统的录波接收端按接收到的现场电气量波形的实测录波量进行数值图形化显示，完成波形实时显示功能。Step 4: The wave recording sending end of the converter station control system directly transmits the measured wave recording volume of the on-site electrical quantity waveform obtained in step 1 to the wave recording receiving end, and the wave recording receiving end of the converter station control system The measured and recorded wave volume of the electrical quantity waveform is displayed numerically and graphically, and the real-time display function of the waveform is completed.
本发明的有益效果：Beneficial effects of the present invention:
本发明注意到电力系统波形，常态下大多为周期性变量其中正弦波形函数居多，利用这一规律，对应周期性变量，事先在波形接收及波形发送端设置好现场电气量波形的录波量周期性时间变化标准参考函数，当每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在每个时刻的值的差值≤预设的误差绝对值时，换流站控制系统的录波发送端不向录波接收端传输现场电气量波形的实测录波量，换流站控制系统的录波接收端按照预设的现场电气量波形的录波量周期性时间变化函数标准参考值进行数值图形化显示；当有一个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值的差值＞预设的误差绝对值时，才进行录波实测数据的传输，波形接收端按照接收的录波实测数值进行波形显示，这样能尽可能的减少波形数据的传输，在不影响电力系统波形传输准确性的情况下，提高了电力系统波形的传输效率，大幅减轻电力系统现场总线的通讯压力。The present invention notices that the power system waveforms are mostly periodic variables under normal conditions, and most of them are sinusoidal waveform functions. Using this rule, corresponding to periodic variables, the wave recording period of the on-site electrical quantity waveform is set in advance at the waveform receiving and waveform sending ends. When the difference between the measured wave volume of the on-site electrical quantity waveform at each moment and the above-mentioned corresponding time-change standard reference function of wave volume ≤ the preset error absolute value , the wave recording sending end of the converter station control system does not transmit the measured wave recording volume of the on-site electrical quantity waveform to the wave recording receiving end, and the wave recording receiving end of the converter station control system follows the preset recorded wave volume of the on-site electrical quantity waveform The standard reference value of the periodic time change function is displayed numerically; when the difference between the measured wave volume of the on-site electrical quantity waveform at a moment and the value of the corresponding time change standard reference function of the recorded wave volume at the corresponding moment >predicted When the absolute value of the error is set, the transmission of the measured wave data is carried out, and the waveform receiving end displays the waveform according to the received measured value of the recorded wave, which can reduce the transmission of the waveform data as much as possible without affecting the accuracy of the waveform transmission of the power system Under the circumstances, the transmission efficiency of the power system waveform is improved, and the communication pressure of the field bus of the power system is greatly reduced.
附图说明Description of drawings
图1为本发明中将每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在每个时刻的值进行比较时的波形图；Fig. 1 is the oscillogram when comparing the value of the measured wave volume of the on-site electrical quantity waveform at each moment with the above-mentioned corresponding wave volume time variation standard reference function at each moment in the present invention;
图2为本发明中非周期函数的波形图。Fig. 2 is a waveform diagram of an aperiodic function in the present invention.
具体实施方式Detailed ways
以下结合附图和具体实施例对本发明作进一步的详细说明：Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
一种低通讯带宽要求的实时波形显示方法，它包括如下步骤：A method for displaying real-time waveforms with low communication bandwidth requirements, comprising the steps of:
步骤1：换流站控制系统的采样设备获取换流站内电力一次设备、电力二次设备和电力辅助设备中需要显示的现场电气量波形的实测录波量；Step 1: The sampling equipment of the converter station control system obtains the measured and recorded waves of the on-site electrical waveforms that need to be displayed in the primary power equipment, power secondary equipment and power auxiliary equipment in the converter station;
步骤2：根据设备厂家资料或技术标准获取换流站内电力一次设备、电力二次设备和电力辅助设备中与上述需要显示的现场电气量波形的实测录波量对应的录波量时间变化标准参考函数，如上述录波量时间变化标准参考函数为周期性函数，则转到步骤3；如上述录波量时间变化标准参考函数为非周期性函数，则转到步骤4；Step 2: According to the equipment manufacturer's information or technical standards, obtain the standard reference for the time change of the recorded wave volume corresponding to the measured recorded wave volume of the above-mentioned on-site electric quantity waveform that needs to be displayed in the power primary equipment, power secondary equipment, and power auxiliary equipment in the converter station function, if the above-mentioned standard reference function of the time change of wave recording volume is a periodic function, then go to step 3; if the above-mentioned standard reference function of time change of wave recording volume is a non-periodic function, then go to step 4;
步骤3：将上述录波量周期性时间变化标准参考函数录入到换流站控制系统的录波发送端和录波接收端，将每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值进行比较，如果每个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值的差值≤预设的误差绝对值(如图1所示，图1属于误差内，现场工作中，运行人员对不同变量有着不同的误差要求，有的变量只要基本趋势一致就行，这时预设误差就可以大些，但有些变量运行人员需要精确观测，则误差需要设的很小，一旦实测值和预测值(函数计算值)的差值大于误差，则启动数据传送)，则换流站控制系统的录波发送端不向录波接收端传输步骤1中获取的现场电气量波形的实测录波量，换流站控制系统的录波接收端按照预设的现场电气量波形的录波量周期性时间变化标准参考函数进行数值图形化显示，完成波形实时显示功能；Step 3: Enter the above standard reference function of the periodic time change of the recorded wave volume into the wave recording sending end and the wave recording receiving end of the converter station control system, and compare the measured wave recording volume of the on-site electrical quantity waveform at each moment with the above corresponding The value of the standard reference function of the time change of the recorded wave volume at the corresponding time is compared. value ≤ preset error absolute value (as shown in Figure 1, Figure 1 is within the error range, in field work, operators have different error requirements for different variables, some variables only need to have the same basic trend, then the preset error It can be larger, but some variable operators need to observe accurately, so the error needs to be set very small. Once the difference between the measured value and the predicted value (function calculation value) is greater than the error, the data transmission will be started), and the converter station control The wave recording sending end of the system does not transmit the measured wave recording volume of the on-site electrical quantity waveform obtained in step 1 to the wave recording receiving end, and the wave recording receiving end of the converter station control system follows the preset recorded wave volume of the on-site electrical quantity waveform The periodic time-varying standard reference function is used for numerical graphical display, and the real-time waveform display function is completed;
如果有一个时刻的现场电气量波形的实测录波量与上述对应的录波量时间变化标准参考函数在对应时刻的值的差值＞预设的误差绝对值，则换流站控制系统的录波发送端向录波接收端传输步骤1中获取的现场电气量波形的实测录波量，换流站控制系统的录波接收端按接收到的现场电气量波形的实测录波量进行数值图形化显示，完成波形实时显示功能；If there is a difference between the measured wave volume of the on-site electrical quantity waveform at a moment and the value of the above-mentioned corresponding standard reference function of wave volume time change at the corresponding moment > the preset error absolute value, then the recorded wave volume of the converter station control system The wave sending end transmits the actual measured wave volume of the on-site electrical quantity waveform obtained in step 1 to the wave recording receiving end, and the wave recording receiving end of the converter station control system performs numerical graphics according to the received actual measured wave volume of the on-site electrical quantity waveform Real-time display of waveform is completed;
步骤4：换流站控制系统的录波发送端向录波接收端直接传输步骤1中获取的现场电气量波形的实测录波量，换流站控制系统的录波接收端按接收到的现场电气量波形的实测录波量进行数值图形化显示，完成波形实时显示功能。Step 4: The wave recording sending end of the converter station control system directly transmits the measured wave recording volume of the on-site electrical quantity waveform obtained in step 1 to the wave recording receiving end, and the wave recording receiving end of the converter station control system The measured and recorded wave volume of the electrical quantity waveform is displayed numerically and graphically, and the real-time display function of the waveform is completed.
上述技术方案中，所述换流站控制系统的录波发送端和录波接收端时钟同步，相互之间存在通信。In the above technical solution, the clocks of the wave recording sending end and the wave recording receiving end of the control system of the converter station are synchronized, and there is communication between them.
上述技术方案中，所述现场电气量波形的实测录波量由按照时间顺序排列的多个录波点数据构成。录波数据的比较指单个录波点数据的比较。In the above technical solution, the measured wave recording volume of the on-site electrical quantity waveform is composed of a plurality of wave recording point data arranged in chronological order. The comparison of wave recording data refers to the comparison of single wave recording point data.
上述技术方案中，当录波量时间变化标准参考函数为电流对应的函数时，所述预设的误差为1～3安培，当录波量时间变化标准参考函数为电压对应的函数时，所述预设的误差为1～3伏特。In the above technical solution, when the standard reference function of the time change of the wave recording volume is a function corresponding to the current, the preset error is 1 to 3 amperes, and when the standard reference function of the time change of the wave recording volume is a function corresponding to the voltage, the The preset error is 1-3 volts.
上述技术方案中，所述步骤1中的换流站内电力一次设备包括断路器、隔离开关和接地刀闸，电力二次设备包括交流和直流保护装置、测控装置、故障录波器，电力辅助设备包括水冷设备、消防设备、空调设备。In the above technical solution, the primary power equipment in the converter station in step 1 includes circuit breakers, disconnectors and grounding switches, and the secondary power equipment includes AC and DC protection devices, measurement and control devices, fault recorders, power auxiliary equipment Including water cooling equipment, fire fighting equipment, air conditioning equipment.
上述技术方案中，所述录波发送端为具有波形量转换功能、波形数据发送功能的电力自动化设备。所述录波接收端为具有波形数据接收功能和波形显示功能的电力自动化设备。In the above technical solution, the sending end of the wave recording is an electric power automation device having the function of converting the wave form quantity and sending the wave form data. The wave recording receiving end is an electric power automation equipment with wave data receiving function and wave display function.
上述技术方案的步骤2中对于没有对应的录波量时间变化标准参考函数的现场电气量波形的实测录波量均按照非周期函数处理，直接转到步骤4。In step 2 of the above technical solution, the measured recorded wave volume of the on-site electric quantity waveform without corresponding time-varying standard reference function of recorded wave volume is processed according to the non-periodic function, and directly goes to step 4.
上述技术方案中，换流站控制系统的录波接收端与录波发送端同时启动录波过程，且发送端时钟与接收端时钟必须一致。In the above technical solution, the wave recording receiving end and the wave recording sending end of the converter station control system start the wave recording process at the same time, and the clock of the sending end must be consistent with the clock of the receiving end.
本说明书未作详细描述的内容属于本领域专业技术人员公知的现有技术。The content not described in detail in this specification belongs to the prior art known to those skilled in the art.
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| CN104360120B (en) | 2017-02-22 |
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