阅读说明：本技术 列车进入无电区状态的快速检测方法、系统及相关组件 (Method and system for rapidly detecting state of train entering dead zone and related components ) 是由 蒋奉兵 张宾 刘清 毛康鑫 何维 李昆 朱宇龙 徐江辉 李敏 熊煜宇 于 2021-01-19 设计创作，主要内容包括：本申请公开了一种列车进入无电区状态的快速检测方法、系统、装置及可读存储介质,该方法包括：按照采样周期持续获取电网电压,并判断第一时间窗口内电网电压的变化率超过第一变化率的异常次数是否超过第一次数；若是,获取列车的运行功率,并根据运行功率判断列车是否处于轻载工况；若是,对列车的四象限变流器进行脉冲封锁；获取四象限变流器与接触网连接端的电气参数,以通过电气参数判断列车是否进入无电区状态。本申请利用轻载工况下四象限变流器的脉冲封锁不会对列车运行造成任何影响的特点,解决了轻载工况无电区检测耗时久的问题,确保了列车带速度通过无电区的安全性,保证了列车的制式切换,具有重要的推广价值。(The application discloses a method, a system and a device for rapidly detecting the state that a train enters a non-electric area and a readable storage medium, wherein the method comprises the following steps: continuously acquiring the power grid voltage according to a sampling period, and judging whether the abnormal times that the change rate of the power grid voltage exceeds the first change rate in a first time window exceeds the first times or not; if so, acquiring the running power of the train, and judging whether the train is in a light-load working condition or not according to the running power; if so, blocking the pulse of the four-quadrant converter of the train; and acquiring the electrical parameters of the connection end of the four-quadrant converter and the contact network so as to judge whether the train enters a no-electricity-zone state or not through the electrical parameters. The characteristics that the pulse blockade of the four-quadrant converter under the light load working condition can not cause any influence to train operation are utilized, the problem that the light load working condition is time-consuming and long-lasting in non-electric-area detection is solved, the safety that the train is provided with speed and passes through the non-electric area is ensured, the system switching of the train is guaranteed, and the method has important popularization value.)

1. A method for rapidly detecting that a train enters a no-zone state is characterized by comprising the following steps:

continuously acquiring the power grid voltage according to a sampling period, and judging whether the abnormal times that the change rate of the power grid voltage exceeds a first change rate in a first time window exceeds a first time;

if so, acquiring the running power of the train, and judging whether the train is in a light-load working condition according to the running power;

if so, carrying out pulse blocking on the four-quadrant converter of the train;

and acquiring the electrical parameters of the connection end of the four-quadrant converter and a contact network so as to judge whether the train enters a no-electricity-zone state or not according to the electrical parameters.

2. The rapid detection method according to claim 1, wherein the determining whether the number of the abnormality times that the change rate of the grid voltage exceeds the first change rate within the first time window exceeds the first number of times includes:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period exceeds a first change rate, adding one to the abnormal times;

judging whether the abnormal times exceed a first time within a first time window;

if not, moving the first time window to the next sampling period, and updating the abnormal times corresponding to the first time window.

3. The rapid detection method according to claim 1, wherein the process of acquiring the electrical parameter of the connection end of the four-quadrant converter and the overhead line system to determine whether the train enters the no-electricity-zone state according to the electrical parameter includes:

and acquiring the power grid voltage so as to judge whether the train enters a no-electricity-zone state or not according to the power grid voltage.

4. The rapid detection method according to claim 3, wherein the process of obtaining the grid voltage to determine whether the train enters the no-battery state through the grid voltage comprises:

judging whether the power grid voltage in a second time window meets a no-zone condition;

and if so, judging that the train enters a non-electric area state.

5. The method of claim 4, wherein the step of determining whether the grid voltage meets the no-zone condition within the second time window comprises:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period is smaller than the second change rate and the grid voltage of the current sampling period is smaller than the preset voltage value, adding one to the grid voltage interruption times;

judging whether the network voltage interruption times exceed a second time within a second time window;

if yes, determining that the power grid voltage meets a no-zone condition in the second time window;

and if not, moving the second time window back to the next sampling period, and updating the network voltage interruption times corresponding to the second time window.

6. The rapid detection method according to claim 1, wherein the electrical parameters comprise:

the current command value and/or the current feedback value and/or the voltage fundamental wave amplitude and/or the voltage phase.

7. The rapid detection method according to any one of claims 1 to 6, wherein the process of obtaining the running power of the train and judging whether the train is in a light-load working condition according to the running power comprises:

acquiring traction power, regenerative braking power and auxiliary variable power of a train;

adding the difference between the traction power and the regenerative braking power and the auxiliary variable power to obtain light-load judgment power;

judging whether the light-load judging power is smaller than a preset judging power;

and if so, judging that the train is in a light load working condition.

8. The utility model provides a train gets into quick detecting system of no electric zone state which characterized in that, includes net voltage anomaly detection module, underload operating mode decision module, pulse blockade module, no electric zone detection module, wherein:

the network voltage abnormity detection module is used for continuously acquiring the network voltage according to the sampling period and judging whether the abnormity frequency of the network voltage, the change rate of which exceeds the first change rate, exceeds the first frequency within the first time window; if yes, triggering the light load working condition judging module;

the light-load working condition judging module is used for acquiring the running power of the train and judging whether the train is in a light-load working condition or not according to the running power; if yes, triggering a pulse blocking module;

the pulse blocking module is used for carrying out pulse blocking on a four-quadrant converter of the train;

the dead zone detection module is used for acquiring electrical parameters of a connection end of the four-quadrant converter and a contact network so as to judge whether the train enters a dead zone state or not according to the electrical parameters.

9. The rapid detection system according to claim 8, wherein the network pressure anomaly detection module is specifically configured to:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period exceeds a first change rate, adding one to the abnormal times;

judging whether the abnormal times exceed a first time within a first time window;

if not, moving the first time window to the next sampling period, and updating the abnormal times corresponding to the first time window.

10. The rapid detection system according to claim 9, wherein the no-cell detection module is specifically configured to:

and acquiring the power grid voltage so as to judge whether the train enters a no-electricity-zone state or not according to the power grid voltage.

11. The rapid detection system according to claim 10, wherein the no-cell detection module is specifically configured to:

judging whether the power grid voltage in a second time window meets a no-zone condition;

and if so, judging that the train enters a non-electric area state.

12. The rapid detection system according to claim 11, wherein the no-cell detection module is specifically configured to:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period is smaller than the second change rate and the grid voltage of the current sampling period is smaller than the preset voltage value, adding one to the grid voltage interruption times;

judging whether the network voltage interruption times exceed a second time within a second time window;

if yes, determining that the power grid voltage meets a no-zone condition in the second time window;

and if not, moving the second time window back to the next sampling period, and updating the network voltage interruption times corresponding to the second time window.

13. The rapid detection system according to claim 8, wherein the electrical parameters comprise:

the current command value and/or the current feedback value and/or the voltage fundamental wave amplitude and/or the voltage phase.

14. The rapid detection system according to any one of claims 8 to 13, wherein the light-load condition determination module is specifically configured to:

acquiring traction power, regenerative braking power and auxiliary variable power of a train;

adding the difference between the traction power and the regenerative braking power and the auxiliary variable power to obtain light-load judgment power;

judging whether the light-load judging power is smaller than a preset judging power;

and if so, judging that the train is in a light load working condition.

15. A rapid detection device for a train entering a no-zone state is characterized by comprising:

a memory for storing a computer program;

a processor for implementing the steps of the method for rapid detection of a train entering a no-battery state as claimed in any one of claims 1 to 7 when executing said computer program.

16. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program which, when being executed by a processor, realizes the steps of the method for rapidly detecting that a train enters a no-battery state according to any one of claims 1 to 7.

Technical Field

The invention relates to the field of train operation control, in particular to a method and a system for rapidly detecting a state that a train enters a dead zone and related components.

Background

The train powered by the alternating current power grid can be put into operation again after being temporarily stopped at junctions of different power supply systems (a phase-divided area and a division-divided area are both called as a non-electricity-free area), and the urgent requirements of trans-regional and trans-national continuous transportation of the train are met. When a train enters a dead zone, how to quickly and accurately detect the state of the dead zone is a necessary requirement for ensuring the safe running of the train passing the dead zone, and the existing method usually takes the amplitude and the phase of the current or the voltage at the network voltage side as a judgment basis.

However, although the actual power supply voltage on the grid side is cut off after the grid enters the dead zone, the intermediate loop voltage of the traction converter cannot suddenly change, and meanwhile, the four-quadrant module is still in a working state, so that the four-quadrant module is inverted in an inverted mode to generate alternating current on the grid voltage side, and the grid voltage side sensor can still detect the voltage within a period of time. When the load power is large, the energy consumption of the support capacitor of the intermediate loop voltage is high, the network voltage is distorted quickly, but when the train is in a light-load working condition, the load power is small, the voltage change of the intermediate loop voltage is slow, the voltage fundamental wave change of the network voltage is not obvious, the voltage characteristic change which is conventionally used as a judgment basis is not obvious, the state can be kept for a period of time, therefore, the contact network in the light-load working condition can be detected to be in a non-electric state for a long time, and great potential safety hazards are caused to the train (particularly in a multi-system) running safety.

Therefore, how to provide a solution to the above technical problems is a problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides a method, a system and related components for rapidly detecting a no-battery state of a train, so as to solve the problem that the no-battery state cannot be rapidly detected under a light load condition. The specific scheme is as follows:

a method for rapidly detecting that a train enters a no-zone state comprises the following steps:

continuously acquiring the power grid voltage according to a sampling period, and judging whether the abnormal times that the change rate of the power grid voltage exceeds a first change rate in a first time window exceeds a first time;

if so, acquiring the running power of the train, and judging whether the train is in a light-load working condition according to the running power;

if so, carrying out pulse blocking on the four-quadrant converter of the train;

and acquiring the electrical parameters of the connection end of the four-quadrant converter and a contact network so as to judge whether the train enters a no-electricity-zone state or not according to the electrical parameters.

Preferably, the determining whether the number of times of abnormality that the change rate of the grid voltage exceeds the first change rate within the first time window exceeds the first number of times includes:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period exceeds a first change rate, adding one to the abnormal times;

judging whether the abnormal times exceed a first time within a first time window;

if not, moving the first time window to the next sampling period, and updating the abnormal times corresponding to the first time window.

Preferably, the process of acquiring the electrical parameter of the connection end of the four-quadrant converter and the overhead contact system to determine whether the train enters the no-electricity-zone state according to the electrical parameter includes:

and acquiring the power grid voltage so as to judge whether the train enters a no-electricity-zone state or not according to the power grid voltage.

Preferably, the process of acquiring the power grid voltage to determine whether the train enters a no-zone state through the power grid voltage includes:

judging whether the power grid voltage in a second time window meets a no-zone condition;

and if so, judging that the train enters a non-electric area state.

Preferably, the step of determining whether the grid voltage in the second time window satisfies a no-zone condition includes:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period is smaller than the second change rate and the grid voltage of the current sampling period is smaller than the preset voltage value, adding one to the grid voltage interruption times;

judging whether the network voltage interruption times exceed a second time within a second time window;

if yes, determining that the power grid voltage meets a no-zone condition in the second time window;

and if not, moving the second time window back to the next sampling period, and updating the network voltage interruption times corresponding to the second time window.

Preferably, the electrical parameters include:

the current command value and/or the current feedback value and/or the voltage fundamental wave amplitude and/or the voltage phase.

Preferably, the process of obtaining the operating power of the train and judging whether the train is in the light-load working condition according to the operating power includes:

acquiring traction power, regenerative braking power and auxiliary variable power of a train;

adding the difference between the traction power and the regenerative braking power and the auxiliary variable power to obtain light-load judgment power;

judging whether the light-load judging power is smaller than a preset judging power;

and if so, judging that the train is in a light load working condition.

Correspondingly, the application discloses train gets into fast detecting system of no electric zone state, including net voltage anomaly detection module, underload operating mode decision module, pulse blockade module, no electric zone detection module, wherein:

the network voltage abnormity detection module is used for continuously acquiring the network voltage according to the sampling period and judging whether the abnormity frequency of the network voltage, the change rate of which exceeds the first change rate, exceeds the first frequency within the first time window; if yes, triggering the light load working condition judging module;

the light-load working condition judging module is used for acquiring the running power of the train and judging whether the train is in a light-load working condition or not according to the running power; if yes, triggering a pulse blocking module;

the pulse blocking module is used for carrying out pulse blocking on a four-quadrant converter of the train;

the dead zone detection module is used for acquiring electrical parameters of a connection end of the four-quadrant converter and a contact network so as to judge whether the train enters a dead zone state or not according to the electrical parameters.

Preferably, the network pressure anomaly detection module is specifically configured to:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period exceeds a first change rate, adding one to the abnormal times;

judging whether the abnormal times exceed a first time within a first time window;

if not, moving the first time window to the next sampling period, and updating the abnormal times corresponding to the first time window.

Preferably, the dead zone detection module is specifically configured to:

and acquiring the power grid voltage so as to judge whether the train enters a no-electricity-zone state or not according to the power grid voltage.

Preferably, the dead zone detection module is specifically configured to:

judging whether the power grid voltage in a second time window meets a no-zone condition;

and if so, judging that the train enters a non-electric area state.

Preferably, the dead zone detection module is specifically configured to:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period is smaller than the second change rate and the grid voltage of the current sampling period is smaller than the preset voltage value, adding one to the grid voltage interruption times;

judging whether the network voltage interruption times exceed a second time within a second time window;

if yes, determining that the power grid voltage meets a no-zone condition in the second time window;

and if not, moving the second time window back to the next sampling period, and updating the network voltage interruption times corresponding to the second time window.

Preferably, the electrical parameters include:

the current command value and/or the current feedback value and/or the voltage fundamental wave amplitude and/or the voltage phase.

Preferably, the light-load working condition determination module is specifically configured to:

acquiring traction power, regenerative braking power and auxiliary variable power of a train;

adding the difference between the traction power and the regenerative braking power and the auxiliary variable power to obtain light-load judgment power;

judging whether the light-load judging power is smaller than a preset judging power;

and if so, judging that the train is in a light load working condition.

Correspondingly, this application still discloses a train gets into quick detection device of no electric zone state, includes:

a memory for storing a computer program;

a processor for implementing the steps of the method for rapidly detecting that a train enters a no-zone state as described in any of the above when executing the computer program.

Accordingly, the present application also discloses a readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for rapidly detecting that a train enters a no-battery state according to any one of the above.

The application discloses a method for rapidly detecting a state that a train enters a dead zone, which comprises the following steps: continuously acquiring the power grid voltage according to a sampling period, and judging whether the abnormal times that the change rate of the power grid voltage exceeds a first change rate in a first time window exceeds a first time; if so, acquiring the running power of the train, and judging whether the train is in a light-load working condition according to the running power; if so, carrying out pulse blocking on the four-quadrant converter of the train; and acquiring the electrical parameters of the connection end of the four-quadrant converter and a contact network so as to judge whether the train enters a no-electricity-zone state or not according to the electrical parameters. The method has the advantages that the characteristic that the pulse blocking of the four-quadrant converter under the light load working condition can not cause any influence on the train operation is utilized, the power grid voltage is monitored to be abnormal, the pulse blocking is carried out on the four-quadrant converter when the train is in the light load condition, the influence of the intermediate voltage of the converter on the power grid voltage detection is eliminated, and then whether the train enters a non-electricity area or not is judged through electrical parameters, so that the problem that the detection of the non-electricity area under the light load working condition consumes time for a long time is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a flowchart illustrating steps of a method for rapidly detecting a train entering a no-zone state according to an embodiment of the present invention;

FIG. 2 is a voltage waveform diagram of a light-load condition of a train entering a no-zone state according to an embodiment of the present invention;

FIG. 3 is a flow chart illustrating the sub-steps of a method for rapidly detecting that a train enters a no-zone state according to an embodiment of the present invention;

FIG. 4 is a flow chart illustrating the sub-steps of a method for rapidly detecting that a train enters a no-zone state according to an embodiment of the present invention;

FIG. 5 is a flow chart illustrating the sub-steps of a method for rapidly detecting that a train enters a no-zone state according to an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a variation of a method for rapidly detecting a train entering a no-zone state according to an embodiment of the present invention;

fig. 7 is a structural distribution diagram of a rapid detection system for a train entering a no-zone state according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

When a train is in a light-load working condition, the load power is small, the voltage change of the intermediate loop is slow, the voltage fundamental wave change of the network voltage is not obvious, the voltage characteristic change which is conventionally used as a judgment basis is not obvious, the non-electricity state of the contact network in which the train is located can be detected in a long time, and great potential safety hazards are caused to the train (particularly in a multi-system) running safety.

The method has the advantages that the pulse blocking of the four-quadrant converter under the light-load working condition can not cause any influence on train operation, the problem that the light-load working condition is time-consuming and long-lasting in non-electric-area detection is solved, the method is free of additional hardware cost, simple to realize, the safety that the train is provided with speed and passes through the non-electric-area is guaranteed, the system switching of the train is guaranteed, and the method has important popularization value.

The embodiment of the invention discloses a method for rapidly detecting a state that a train enters a dead zone, which is shown in figure 1 and comprises the following steps:

s1: continuously acquiring the voltage of the power grid according to a sampling period;

s2: judging whether the abnormal times that the change rate of the grid voltage exceeds the first change rate in the first time window exceeds the first times or not;

it can be understood that after the train enters the dead zone, the grid voltage will have a short sudden change, such as the waveform shown in fig. 2 within a time frame of 110 ms. Thus, when a sudden change in the grid voltage is detected, i.e. the rate of change exceeds the first rate of change, it is highly likely that the train has entered the no-load zone.

If not, continuing to step S1 to continuously obtain the grid voltage according to the sampling period, and updating the abnormal times in the first time window according to the abnormal value of the grid voltage obtained each time.

S3: if so, acquiring the running power of the train, and judging whether the train is in a light-load working condition or not according to the running power;

s4: if so, blocking the pulse of the four-quadrant converter of the train;

if the judgment result of the step S3 is no, the steps S1 and S2 are executed again to continue the following of the first time window and the counting of the number of abnormal times.

S5: and acquiring the electrical parameters of the connection end of the four-quadrant converter and the contact network so as to judge whether the train enters a no-electricity-zone state or not through the electrical parameters.

It can be understood that the train has the following characteristics under the light-load working condition: the pulse blocking of the four-quadrant converter does not affect the running of a train, so that the problem that the voltage of the middle capacitor is kept for a long time in a dead zone under a light-load working condition is solved, the four-quadrant converter can be subjected to pulse blocking when the situation that the middle capacitor possibly enters the dead zone and the train is under the light load is judged through S2, and after the influence of the current of the middle capacitor of the converter on the power grid side is eliminated, whether the train enters the dead zone or not is judged through electrical parameters.

It can be understood that the determination in step S2 and the determination in step S3 may not be in a sequential relationship, but considering that the occurrence probability of the grid voltage abnormality is obviously smaller than the occurrence probability of the light-load operating condition, in order to improve the determination efficiency, the grid voltage abnormality may be determined first, and then the light-load operating condition may be determined.

Further, when it is determined in step S5 whether the train enters the no-zone state, characteristics of various electrical parameters may be selected as a determination basis, and the determination method may further include a current command value and/or a current feedback value and/or a voltage fundamental wave amplitude and/or a voltage phase, in addition to the same grid voltage as that in step S2, and includes: judging by using a current instruction value and a current feedback value of a controller of the four-quadrant converter; judging by comparing the phase angle locked by the phase-locked loop with the phase angle in normal operation; judging whether the difference between the voltage fundamental wave amplitude value, the voltage phase difference value and the current feedback value is larger than a preset value or not; and decomposing the power grid voltage to judge whether the dq axis components are all smaller than a set value or not.

The method has the advantages that the characteristic that the pulse blocking of the four-quadrant converter under the light load working condition can not cause any influence on the train operation is utilized, the power grid voltage is monitored to be abnormal, the pulse blocking is carried out on the four-quadrant converter when the train is in the light load condition, the influence of the intermediate voltage of the converter on the power grid voltage detection is eliminated, and then whether the train enters a non-electricity area or not is judged through electrical parameters, so that the problem that the detection of the non-electricity area under the light load working condition consumes time for a long time is solved.

The embodiment of the invention discloses a specific method for rapidly detecting a state that a train enters a dead zone, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme.

Specifically, referring to fig. 3, step S2 may include:

s21: calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

s22: determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

s23: if the change rate of the current sampling period exceeds the first change rate, adding one to the abnormal times;

s24: judging whether the abnormal times exceed the first times in the first time window;

if yes, the current power grid voltage can be directly determined to be in an abnormal state;

s25: if not, moving the first time window back to the next sampling period, and updating the abnormal times corresponding to the first time window.

Specifically, the voltage transient U of the current sampling period, i.e., the nth period_jump(n) is the absolute value of the difference between the grid voltage U (n) of the current sampling period and the grid voltage U (n-1) of the previous sampling period, that is: u shape_jump(n) ═ U (n) — U (n-1) |; further, the change rate of the current sampling period is a voltage abrupt change U_jumpThe ratio of (n) to the sampling period duration Ts, i.e.:counting from zero if the abnormal times are eta, and if the change rate U '(n) of the current period exceeds a first change rate U'₁I.e. U '(n) > U'₁Setting the change rate flag δ (n) to 1, that is, δ (n) equals 1, and conversely, δ (n) equals 0; can be used forIt is understood that the first time window T_win1The value of the number of anomalies η in, i.e. the first time window T_win1The sum of the rate of change flags of all the samples within, and a first time window T_win1Always following the sampling point, when the number of sampling times does not exceed the first time window T_win1When the number of samples Nt is specified, the abnormal times eta can be obtained by directly accumulating all the change rate marks, and the first time window T is divided into_win1When moving backward to the next sampling period, the abnormal times need to be updated, the change rate flag delta (n) of the current sampling period is counted, and the first time window T of the previous sampling period is discarded_win1The first rate of change flag δ (n-Nt) in (a), and thus the number of anomalies η is given by:

the embodiment of the invention discloses a specific method for rapidly detecting a state that a train enters a dead zone, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme.

Specifically, referring to fig. 4, the step S3 of obtaining the operating power of the train, and determining whether the train is in the light load condition according to the operating power includes:

s31: obtaining the traction power P of the train_DRRegenerative braking power P_BRAnd an auxiliary variable power P_AR；

S32: will pull power P_DRRegenerative braking power P_BRDifferential and auxiliary power P_ARAdding to obtain light-load judgment power P_LIGHTI.e. P_LIGHT＝P_DR-P_BR+P_AR；

S33: judging whether the light-load judging power is smaller than a preset judging power or not;

s34: if so, judging that the train is in a light load working condition.

It can be understood that, when the specific determination is made as to whether the load is light, the determination may also be performed according to other power parameters, and the embodiment is not limited.

The embodiment of the invention discloses a specific method for rapidly detecting a state that a train enters a dead zone, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme.

Specifically, step S5 acquires the electrical parameter of four-quadrant converter and contact net link to judge through the electrical parameter whether the train enters the process of no electric zone state, in order to acquire grid voltage, when judging through grid voltage whether the train enters the form realization of no electric zone state, include:

judging whether the power grid voltage in the second time window meets the no-zone condition;

if yes, the train is judged to enter a no-electricity zone state.

Specifically, referring to fig. 5 and fig. 6, similar to the process of following the first window time in the previous embodiment, the process of determining whether the grid voltage in the second time window satisfies the no-cell condition includes:

s51: calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

s52: determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

s53: if the change rate of the current sampling period is smaller than the second change rate and the grid voltage of the current sampling period is smaller than the preset voltage value, adding one to the grid voltage interruption times;

s54: judging whether the network voltage interruption frequency exceeds a second frequency or not in a second time window;

s55: if so, judging that the power grid voltage in the second time window meets the no-zone condition;

s56: if not, moving the second time window back to the next sampling period, and updating the network pressure interruption times corresponding to the second time window.

Specifically, the voltage transient U of the current sampling period_jump(n) is the absolute value of the difference between the grid voltage U (n) of the current sampling period and the grid voltage U (n-1) of the previous sampling period, that is: u shape_jump(n) ═ U (n) — U (n-1) |; further, the current sampling periodThe rate of change of (2) is a voltage sudden change U_jumpThe ratio of (n) to the sampling period duration Ts, i.e.:counting from zero if the network voltage interruption times are lambda, and if the change rate U '(n) of the current period exceeds a second change rate U'₂I.e. U '(n) > U'₂And the grid voltage U (n) is less than the preset voltage value U_refI.e. U (n) < U_refMarking the network voltage interruptionPut 1, i.e.On the contrary, the method can be used for carrying out the following steps,it will be appreciated that the second time window T_win2The value of the number of internal network voltage interruptions lambda, i.e. the second time window T_win2Network voltage interruption sign of all internal sampling pointsAnd a second time window T_win2Always following the sampling point, when the number of sampling times does not exceed the second time window T_win2When the number of samples Nq is specified, all network voltage interruption marks are directly accumulatedObtaining the network voltage interruption times lambda, and setting the second time window T_win2When moving backward to the next sampling period, the network voltage interruption times lambda need to be updated, and the network voltage interruption mark of the current sampling period is countedAnd discarding the second time window T of the last sampling period_win2First network voltage interruption mark inTherefore, the formula for solving the network voltage interruption times λ is as follows:

it can be understood that a time window is additionally arranged in the whole judging process of the condition of the no-electric area, and the judging accuracy is improved.

Correspondingly, the embodiment of the present application further discloses a system for rapidly detecting a state that a train enters a non-electric area, which is shown in fig. 7 and includes a network voltage abnormity detection module 1, a light load working condition determination module 2, a pulse blocking module 3 and a non-electric area detection module 4, wherein:

the network voltage abnormity detection module 1 is used for continuously acquiring the network voltage according to the sampling period and judging whether the abnormity frequency that the change rate of the network voltage exceeds the first change rate in the first time window exceeds the first frequency; if yes, triggering a light load working condition judgment module 2;

the light-load working condition judging module 2 is used for acquiring the running power of the train and judging whether the train is in a light-load working condition or not according to the running power; if yes, triggering the pulse blocking module 3;

the pulse blocking module 3 is used for carrying out pulse blocking on a four-quadrant converter of the train;

the no-electric-zone detection module 4 is used for acquiring electrical parameters of a connection end of the four-quadrant converter and a contact network, and judging whether the train enters a no-electric-zone state or not according to the electrical parameters.

The method has the advantages that the characteristic that the pulse blocking of the four-quadrant converter under the light load working condition can not cause any influence on the train operation is utilized, the power grid voltage is monitored to be abnormal, the pulse blocking is carried out on the four-quadrant converter when the train is in the light load condition, the influence of the intermediate voltage of the converter on the power grid voltage detection is eliminated, and then whether the train enters a non-electricity area or not is judged through electrical parameters, so that the problem that the detection of the non-electricity area under the light load working condition consumes time for a long time is solved.

In some specific embodiments, the network pressure anomaly detection module 1 is specifically configured to:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period exceeds the first change rate, adding one to the abnormal times;

judging whether the abnormal times exceed the first times in the first time window;

if not, moving the first time window back to the next sampling period, and updating the abnormal times corresponding to the first time window.

In some specific embodiments, the dead zone detection module 4 is specifically configured to:

and acquiring the power grid voltage to judge whether the train enters a no-zone state or not through the power grid voltage.

In some specific embodiments, the dead zone detection module 4 is specifically configured to:

judging whether the power grid voltage in the second time window meets the no-zone condition;

if yes, the train is judged to enter a no-electricity zone state.

In some specific embodiments, the dead zone detection module 4 is specifically configured to:

calculating the voltage break variable of the grid voltage in the current sampling period and the grid voltage in the previous sampling period;

determining the ratio of the voltage break variable to the sampling period duration as the change rate of the grid voltage of the current sampling period;

if the change rate of the current sampling period is smaller than the second change rate and the grid voltage of the current sampling period is smaller than the preset voltage value, adding one to the grid voltage interruption times;

judging whether the network voltage interruption frequency exceeds a second frequency or not in a second time window;

if so, judging that the power grid voltage in the second time window meets the no-zone condition;

if not, moving the second time window back to the next sampling period, and updating the network pressure interruption times corresponding to the second time window.

In some specific embodiments, the electrical parameters include:

the current command value and/or the current feedback value and/or the voltage fundamental wave amplitude and/or the voltage phase.

In some specific embodiments, the light-load condition determination module 2 is specifically configured to:

acquiring traction power, regenerative braking power and auxiliary variable power of a train;

the traction power and the regenerative braking power are subjected to difference and added with the auxiliary variable power to obtain light-load judgment power;

judging whether the light-load judging power is smaller than a preset judging power or not;

if so, judging that the train is in a light load working condition.

Correspondingly, this application embodiment still discloses a train gets into quick detection device of no electric zone state, includes:

a memory for storing a computer program;

a processor for implementing the steps of the method for rapidly detecting that a train enters a no-zone state as in any of the above embodiments when executing the computer program.

Correspondingly, the embodiment of the application also discloses a readable storage medium, wherein a computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the method for rapidly detecting that a train enters the no-zone state according to any one of the above embodiments are realized.

The details of the method for rapidly detecting that a train enters a no-electricity-zone state may refer to the description in the above embodiments, and are not repeated herein.

The device for rapidly detecting the state of the train entering the dead zone and the readable storage medium in the present application have the same technical effects as the method for rapidly detecting the state of the train entering the dead zone in the above embodiments, and are not described herein again.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The method, the system and the related components for rapidly detecting the state that the train enters the dead zone are introduced in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.