阅读说明：本技术 一种列车运行能耗计量方法 (Train operation energy consumption metering method ) 是由 肖方膺 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种列车运行能耗计量方法,包括以下步骤：S1、采用电压传感器与电流传感器对列车运行过程中的电压与电流进行采集,S2、将电压与电流分别与信号增益项相乘得到原始电压与电流,并在一个采样周期内,根据原始电压与电流值计算实时功率,并对时间进行积分得到该采样周期内的能量值；本发明能够实现实时、精准地对列车牵引能耗、再生制动能和辅助能耗进行计量并存储,方便轨道交通运营公司对能量数据进行管理,为列车运行能量分析提供准确的数据支撑,为城市轨道交通的节能减排奠定基础。(The invention discloses a train operation energy consumption metering method, which comprises the following steps: s1, collecting voltage and current in the running process of the train by adopting a voltage sensor and a current sensor, S2, multiplying the voltage and the current by a signal gain term respectively to obtain original voltage and current, calculating real-time power according to the original voltage and the current value in a sampling period, and integrating time to obtain an energy value in the sampling period; the invention can realize real-time and accurate measurement and storage of train traction energy consumption, regenerative braking energy and auxiliary energy consumption, is convenient for rail transit operation companies to manage energy data, provides accurate data support for train operation energy analysis, and lays a foundation for energy conservation and emission reduction of urban rail transit.)

1. The train operation energy consumption metering method is characterized by comprising the following steps of:

s1, collecting the voltage and the current in the running process of the train by adopting a voltage sensor and a current sensor, and executing the following steps:

SS1, converting the collected large voltage and large current into small voltage and small current, sampling the analog signals of the small voltage and small current in a fixed period, and converting the analog signals of the small voltage and small current into digital signals of the small voltage and small current;

SS2, filtering the high-frequency noise contained in the digital signal, and compensating the amplitude loss generated after passing through the noise filtering module;

SS3, calibrating the digital signal according to the zero value calibration result of the voltage and current sensor, and setting a gain term of the voltage and current signal;

s2, multiplying the voltage and the current with the signal gain term respectively to obtain original voltage and current, calculating real-time power according to the original voltage and the current value in a sampling period, and integrating the time to obtain an energy value in the sampling period;

s3, respectively setting energy overflow threshold values of different categories according to different energy categories, respectively accumulating the energy values of the different categories in a plurality of periods, giving out a pulse representing the energy overflow of a certain category when the accumulation of the energy values of the certain category exceeds the corresponding energy overflow threshold value, accumulating and clearing the energy values of the category, and accumulating the energy values of the category again;

and S4, accumulating the energy of different types respectively according to the pulse of the energy overflow of different types to obtain the total train operation energy consumption.

2. The train operation energy consumption metering method according to claim 1, wherein the different types of energy in step S3 include traction energy consumption, auxiliary energy consumption and regenerative braking energy, and the collection points of the voltage and the current in step S1 are divided into the vicinity of a VVVF box in a train motor car and the vicinity of a SIV box of a train trailer;

and measuring the acquisition point of the traction energy consumption and the regenerative braking energy near a VVVF box in the train motor car, and measuring the acquisition point of the auxiliary energy consumption near an SIV box.

3. The method as claimed in claim 1, wherein the signal gain term in step SS3 is a multiple of the attenuation of the original signal to the signal gain module.

4. The method as claimed in claim 1, wherein the zero calibration result of the sensor in step SS3 is the output value of the sensor when the voltage and current sensor inputs are respectively the standard zero voltage and the standard zero current, and the calibration is the difference between the input signal and the calibration result.

5. The method of claim 1, wherein the step S4 is implemented by accumulating in units of days.

Technical Field

The invention belongs to the field of energy metering, and particularly relates to a train operation energy consumption metering method.

Background

With the annual increase of urban population in China, more and more cities put urban rail transit construction into development planning. However, the rapid development of urban rail transit inevitably brings huge energy consumption, because the development of green rail transit is more and more emphasized by people, the energy conservation and emission reduction of energy-saving urban rail transit firstly needs to accurately measure train energy, the energy consumption in the running process of a train mainly comprises traction energy consumption and auxiliary energy consumption, and in addition, regenerative braking energy can also be generated;

the existing train operation energy consumption metering method has certain defects, cannot accurately meter and store train traction energy consumption, regenerative braking energy and auxiliary energy consumption in real time, and is inconvenient for a rail transit operation company to manage energy data.

Disclosure of Invention

The invention aims to provide a train operation energy consumption metering method, which mainly solves the problems that the existing train operation energy consumption metering method in the background technology has certain defects, can not accurately meter and store train traction energy consumption, regenerative braking energy and auxiliary energy consumption in real time, and is inconvenient for a rail transit operation company to manage energy data.

The purpose of the invention can be realized by the following technical scheme:

a train operation energy consumption metering method comprises the following steps:

s1, collecting the voltage and the current in the running process of the train by adopting a voltage sensor and a current sensor, and executing the following steps:

SS1, converting the collected large voltage and large current into small voltage and small current, sampling the analog signals of the small voltage and small current in a fixed period, and converting the analog signals of the small voltage and small current into digital signals of the small voltage and small current;

SS2, filtering the high-frequency noise contained in the digital signal, and compensating the amplitude loss generated after passing through the noise filtering module;

SS3, calibrating the digital signal according to the zero value calibration result of the voltage and current sensor, and setting a gain term of the voltage and current signal;

s2, multiplying the voltage and the current with the signal gain term respectively to obtain original voltage and current, calculating real-time power according to the original voltage and the current value in a sampling period, and integrating the time to obtain an energy value in the sampling period;

s3, respectively setting energy overflow threshold values of different categories according to different energy categories, respectively accumulating the energy values of the different categories in a plurality of periods, giving out a pulse representing the energy overflow of a certain category when the accumulation of the energy values of the certain category exceeds the corresponding energy overflow threshold value, accumulating and clearing the energy values of the category, and accumulating the energy values of the category again;

and S4, accumulating the energy of different types respectively according to the pulse of the energy overflow of different types to obtain the total train operation energy consumption.

As a further scheme of the invention: the different types of energy in the step S3 comprise traction energy consumption, auxiliary energy consumption and regenerative braking energy, and the acquisition points of the voltage and the current in the step S1 are divided into the vicinity of a VVVF box and the vicinity of a SIV box of a train trailer in a train motor car;

and measuring the acquisition point of the traction energy consumption and the regenerative braking energy near a VVVF box in the train motor car, and measuring the acquisition point of the auxiliary energy consumption near an SIV box.

As a further scheme of the invention: the signal gain term in step SS3 is the multiple of the original signal attenuated by the signal gain module.

As a further scheme of the invention: in step SS3, the zero-value calibration result of the sensor refers to the output value of the sensor when the input of the voltage and current sensor is respectively the standard zero voltage and the standard zero current, and the calibration refers to the difference between the input signal and the calibration result.

As a further scheme of the invention: the accumulation manner in step S4 is accumulation in units of days.

The invention has the beneficial effects that:

(1) the energy metering method comprises the steps of multiplying voltage and current by a signal gain term respectively to obtain original voltage and current, calculating real-time power according to the original voltage and current in a sampling period, integrating time to obtain energy values in the sampling period, setting energy overflow threshold values of different categories according to different energy categories, accumulating the energy values of different categories in a plurality of periods respectively, giving out a pulse representing energy overflow of a category when the energy value accumulation of a certain category exceeds the corresponding energy overflow threshold value, accumulating the energy values of the category, clearing, re-accumulating the energy values of the category, accumulating the energy values of different categories respectively according to the energy overflow pulse of the different categories to obtain total train running energy consumption, and realizing real-time and accurate train traction energy consumption, The regenerative braking energy and the auxiliary energy consumption are measured and stored, so that the rail transit operation company can conveniently manage the energy data, accurate data support is provided for train operation energy analysis, and a foundation is laid for energy conservation and emission reduction of urban rail transit.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic flow chart of the present invention.

Detailed Description

As shown in fig. 1, a method for metering train operation energy consumption includes the following steps:

s1, collecting the voltage and the current in the running process of the train by adopting a voltage sensor and a current sensor, and executing the following steps:

SS1, converting the collected large voltage and large current into small voltage and small current, improving the safety of the energy consumption metering method, sampling the analog signals of the small voltage and small current in a fixed period, and converting the analog signals into digital signals of the small voltage and small current;

SS2, filtering the high-frequency noise contained in the digital signal, thereby reducing the signal noise and compensating the amplitude loss generated after passing through the noise filtering module;

SS3, calibrating the digital signal according to the zero value calibration result of the voltage and current sensor, and setting a gain term of the voltage and current signal;

s2, multiplying the voltage and the current with the signal gain term respectively to obtain original voltage and current, calculating real-time power according to the original voltage and the current value in a sampling period, and integrating the time to obtain an energy value in the sampling period;

s3, respectively setting energy overflow threshold values of different categories according to different energy categories, respectively accumulating the energy values of the different categories in a plurality of periods, giving out a pulse representing the energy overflow of a certain category when the accumulation of the energy values of the certain category exceeds the corresponding energy overflow threshold value, accumulating and clearing the energy values of the category, and accumulating the energy values of the category again;

and S4, accumulating the energy of different types respectively according to the pulse of the energy overflow of different types to obtain the total train operation energy consumption.

Example 1

When the energy in the sampling period is calculated in the steps S2-S4, when the acquisition point is located in a train and the current is positive, the energy is traction energy consumption; when the collection point is positioned on a train motor car and the current is negative, the energy is regenerative braking energy; when the collection point is the train trailer, the energy is auxiliary energy consumption, and overflow threshold values beta of traction energy consumption, regenerative braking energy and auxiliary energy consumption are respectively set₁、β₂And beta₃Accumulating the energy values of different classes in multiple periods respectively to obtain 0 to W₁、W₂And W₃When the accumulated energy value of a certain category exceeds the corresponding energy overflow threshold, the module gives a pulse for indicating the energy overflow of the category, clears the accumulated energy of the category and re-accumulates the energy of the category, such as W₁＞β₁Then, a pulse h representing the overflow of the traction energy consumption is output₁And zero clearing W₁And accumulating and storing the energy of different categories by day according to the energy overflow pulses of different categories, if h is detected₁Pulse, then to W₁And accumulating to obtain the traction energy consumption in the day.

The different types of energy in the step S3 comprise traction energy consumption, auxiliary energy consumption and regenerative braking energy, and the acquisition points of the voltage and the current in the step S1 are divided into the vicinity of a VVVF box in a train motor car and the vicinity of a SIV box of a train trailer;

the collection point for measuring the traction energy consumption and the regenerative braking energy is near a VVVF box in a train motor car, and the collection point for measuring the auxiliary energy consumption is near an SIV box.

The signal gain term in step SS3 is the multiple of the attenuation of the original signal to the signal gain module to ensure the accuracy of the subsequent calculation.

In step SS3, the sensor zero value calibration result is the output value of the sensor when the voltage and current sensor inputs are respectively the standard zero voltage and the standard zero current, and the calibration is the difference between the input signal and the calibration result.

In step S4, the accumulation mode is accumulation in units of days.

The method for metering the running energy of the urban rail train comprises the steps of firstly collecting voltage and current in the running process of the train by using a voltage sensor and a current sensor when metering energy, then converting the collected large voltage and large current into small voltage and small current, sampling analog signals of the small voltage and the small current in a fixed period, converting the analog signals into digital signals of the small voltage and the small current, filtering high-frequency noise contained in the digital signals, compensating amplitude loss generated after the analog signals pass through a noise filtering module, calibrating the digital signals according to a zero value calibration result of the voltage and the current sensor, setting a voltage and current signal gain term, multiplying the voltage and the current by a signal gain term respectively to obtain original voltage and current, and calculating real-time power according to the original voltage and the current value in a sampling period, integrating time to obtain an energy value in the sampling period, respectively setting energy overflow threshold values of different categories according to different energy categories, respectively accumulating the energy values of the different categories in a plurality of periods, giving a pulse representing the energy overflow of the category when the accumulation of the energy values of a certain category exceeds the corresponding energy overflow threshold value, accumulating and clearing the energy values of the category, re-accumulating the energy values of the category, and finally respectively accumulating the energy values of the different categories according to the energy overflow pulses of the different categories to obtain the total train operation energy consumption, wherein when the energy in the sampling period is calculated, when an acquisition point is positioned in a train and the current is positive, the energy is traction energy consumption; when the collection point is positioned on a train motor car and the current is negative, the energy is regenerative braking energy; when the collection point is the train trailer, the energy is auxiliary energy consumption, and overflow threshold values beta of traction energy consumption, regenerative braking energy and auxiliary energy consumption are respectively set₁、β₂And beta₃Accumulating the energy values of different classes in multiple periods respectively to obtain 0 to W₁、W₂And W₃When the accumulated energy value of a certain category exceeds the corresponding energy overflow threshold, the module gives an indication that the accumulated energy value exceeds the corresponding energy overflow thresholdPulse of overflow of class energy, zero clearing of accumulated energy of class, and re-accumulation of energy of class, e.g. W₁＞β₁Then, a pulse h representing the overflow of the traction energy consumption is output₁And zero clearing W₁And accumulating and storing the energy of different categories by day according to the energy overflow pulses of different categories, if h is detected₁Pulse, then to W₁The traction energy consumption in the day is obtained through accumulation, the energy metering method can realize real-time and accurate metering and storage of the traction energy consumption, the regenerative braking energy and the auxiliary energy consumption of the train, is convenient for rail transit operation companies to manage energy data, provides accurate data support for train operation energy analysis, and lays a foundation for energy conservation and emission reduction of urban rail transit.

The invention has the following beneficial effects:

(1) the energy metering method comprises the steps of multiplying voltage and current by a signal gain term respectively to obtain original voltage and current, calculating real-time power according to the original voltage and current in a sampling period, integrating time to obtain energy values in the sampling period, setting energy overflow threshold values of different categories according to different energy categories, accumulating the energy values of different categories in a plurality of periods respectively, giving out a pulse representing energy overflow of a category when the energy value accumulation of a certain category exceeds the corresponding energy overflow threshold value, accumulating the energy values of the category, clearing, re-accumulating the energy values of the category, accumulating the energy values of different categories respectively according to the energy overflow pulse of the different categories to obtain total train running energy consumption, and realizing real-time and accurate train traction energy consumption, The regenerative braking energy and the auxiliary energy consumption are measured and stored, so that the rail transit operation company can conveniently manage the energy data, accurate data support is provided for train operation energy analysis, and a foundation is laid for energy conservation and emission reduction of urban rail transit.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.