技术领域technical field
本发明涉及一种机车无线供电系统的分段导轨切换方法。The invention relates to a segment guide rail switching method of a locomotive wireless power supply system.
背景技术Background technique
现有的机车无线供电系统的分段导轨供电技术，其工作过程和原理是：将直流电或低频交流电通过高频逆变器转换为高频交流电，并注入到轨道中央的单匝线圈(能量发射导轨)中，为了减小能量发射导轨的自感和提高能量的传输效率，整个供电段被分成了若干个能量发射导轨段，每段能量发射导轨均通过双绞线并联连接在该供电段的高频逆变器输出端。由于双绞线的绕向相反、流过的电流相等，因此产生的磁场大小相等，方向相反，而完全互相抵消，也即能量发射导轨的双绞线传输段不会对外发射电磁场。每段能量发射导轨只在机车(机车)进入时才连通工作，连通时的能量发射导轨(单匝线圈)通入高频交流电，产生高频交变磁场，机车通过位于车体底部的能量拾取线圈感应出电能并将其储存在车载电池中，一旦机车离开对应的分段导轨，则切断该区间的供电。由于机车未进入时的分段导轨并未给予供电，有效降低了生物体进入导轨区间可能受到电磁辐射危害的几率，提高了电能利用率。The existing segmented guide rail power supply technology of locomotive wireless power supply system, its working process and principle are: convert direct current or low-frequency alternating current into high-frequency alternating current through high-frequency inverter, and inject it into the single-turn coil in the center of the track (energy emission In the guide rail), in order to reduce the self-inductance of the energy emission guide rail and improve the energy transmission efficiency, the entire power supply section is divided into several energy emission guide rail sections, and each section of the energy emission guide rail is connected in parallel to the power supply section through a twisted pair High frequency inverter output. Since the winding directions of the twisted pairs are opposite and the currents flowing through them are equal, the generated magnetic fields are equal in size and opposite in direction, and completely cancel each other out, that is, the twisted pair transmission section of the energy emission guide rail will not emit electromagnetic fields to the outside. Each segment of the energy emission guide rail is connected to work only when the locomotive (locomotive) enters. When the energy emission guide rail (single-turn coil) is connected, the high-frequency alternating current is connected to generate a high-frequency alternating magnetic field. The locomotive picks up energy through the energy at the bottom of the car body. The coil induces electrical energy and stores it in the on-board battery. Once the locomotive leaves the corresponding section of the guide rail, the power supply in this section is cut off. Since the segmented guide rails are not supplied with power when the locomotive does not enter, the probability that organisms entering the guide rail section may be harmed by electromagnetic radiation is effectively reduced, and the utilization rate of electric energy is improved.
目前，无线供电系统的分段导轨切换控制多基于传感器技术，需在分段导轨的入口处设置磁性传感器或位置传感器等，依据各分段导轨传感器的检测信号，可判断出机车所在的分段导轨并给予供电。然而，在大功率及室外应用场合下，基于传感器的分段导轨切换控制方法却存在很多问题，传感器易受到无线供电系统的大功率高频电磁场的干扰，导致其可靠性大大降低，从而造成分段导轨切换控制的误操作。At present, the segment guide rail switching control of the wireless power supply system is mostly based on sensor technology. It is necessary to install a magnetic sensor or a position sensor at the entrance of the segment guide rail. According to the detection signal of each segment guide rail sensor, the segment where the locomotive is located can be determined rail and provide power. However, in high-power and outdoor applications, there are many problems in the sensor-based segmented rail switching control method. The sensor is easily interfered by the high-power and high-frequency electromagnetic field of the wireless power supply system, which greatly reduces its reliability, resulting in split Misoperation of segment rail switching control.
发明内容Contents of the invention
本发明的目的是提供一种机车无线供电系统的分段导轨切换方法，该方法能更准确、可靠地判断出机车动态运行时所在的分段导轨，其分段导轨的切换更加可靠。The object of the present invention is to provide a segment guide rail switching method for a locomotive wireless power supply system. The method can more accurately and reliably determine the segment guide rail where the locomotive is dynamically running, and the segment guide rail switching is more reliable.
本发明实现其发明目的所采用的技术方案是，一种机车无线供电系统的分段导轨切换方法，其具体做法是：The technical solution adopted by the present invention to realize the purpose of the invention is a segmented guide rail switching method of a locomotive wireless power supply system, and its specific method is:
a、各能量发射导轨段均通过检测开关管与低功耗交流电源连接，初始时，各能量发射导轨段的换流控制器控制检测开关管处于导通状态，使低功耗交流电源向能量发射导轨段通入小电流；同时各能量发射导轨段的换流控制器控制供电开关管断开，使无线供电系统的高频逆变器同能量发射导轨段断开，无线供电系统各能量发射导轨段均处于检测工作状态；a. Each energy emission guide rail section is connected to a low-power AC power supply through a detection switch tube. Initially, the commutation controller of each energy emission guide rail section controls the detection switch tube to be in a conducting state, so that the low power consumption AC power supply A small current is passed into the launching guide rail section; at the same time, the commutation controller of each energy launching guide rail section controls the power supply switch tube to be disconnected, so that the high frequency inverter of the wireless power supply system is disconnected from the energy launching guide rail section, and each energy emission of the wireless power supply system The guide rail sections are all in the detection working state;
b、由各能量发射导轨段两端并联的电压检测装置检测能量发射导轨段的两端电压的当前时刻瞬时值ut，并由各能量发射导轨段上的电流检测装置实时测量能量发射导轨段的电流的当前时刻瞬时值it，其中下标t代表当前采样时刻的时间；b. The voltage detection device connected in parallel at both ends of each energy emission guide rail section detects the instantaneous value ut of the voltage at both ends of the energy emission guide rail section at the current moment, and the current detection device on each energy emission guide rail section measures the energy emission guide rail section in real time The instantaneous valueit at the current moment of the current, where the subscript t represents the time at the current sampling moment;
c、各能量发射导轨段的换流控制器接收电压检测装置、电流检测装置分别测得的电压当前时刻瞬时值ut和电流当前时刻瞬时值it，通过短时傅里叶变换算法，计算出电压当前时刻瞬时值ut和电流当前时刻瞬时值it的相量形式，并分别记为和换流控制器再计算得出当前时刻的能量发射导轨段的线阻抗Zt，记ZH为设定的能量发射导轨段无机车驶入时的阻抗阈值，对任一能量发射导轨段：c. The converter controllers of each energy emission guide rail section receive the instantaneous value ut of the voltage at the current moment and the instantaneous value of the current itt at the current moment measured by the voltage detection device and the current detection device respectively, and calculate it through the short-time Fourier transform algorithm The phasor form of the instantaneous value ut of voltage at the current moment and the instantaneous value it of current at the current moment are obtained, and are recorded as and The converter controller then calculates the line impedance Zt of the energy emission guide rail section at the current moment, Denote ZH as the impedance threshold value of the set energy emission guide rail section when no vehicle enters, and for any energy emission guide rail section:
若Zt≥Zt-1且Zt>ZH，则判断该能量发射导轨段所在区间有机车进入的可能，换流控制器的计数器次数加1，转d步；若Zt≤ZH，则判断该能量发射导轨段所在区间无机车，换流控制器的计数器次数置0，换流控制器保持或恢复该能量发射导轨段的检测工作状态；其中下标t-1代表前一采样时刻的时间；If Zt ≥ Zt-1 and Zt > ZH , it is judged that there is a possibility of locomotives entering the section where the energy emission guide rail section is located, and the counter of the commutation controller is incremented by 1, and then go to step d; if Zt ≤ ZH , then it is judged that there is no locomotive in the section where the energy emission guideway section is located, the counter of the commutation controller is set to 0, and the commutation controller maintains or restores the detection working state of the energy emission guideway section; the subscript t-1 represents the previous sampling moment of time;
d、若在设定的时间内，换流控制器的计数器的次数达到设定的次数阈值，则换流控制器控制相应的检测开关管关断，低功耗交流电源不再向该能量发射导轨段供电；同时换流控制器控制相应的供电开关管开通，使无线供电系统的高频逆变器与该能量发射导轨段连通，无线供电系统的该能量发射导轨段处于供电工作状态；否则，换流控制器不动作，无线供电系统的该能量发射导轨段处于处于检测工作状态。d. If within the set time, the number of times of the counter of the commutation controller reaches the set threshold, the commutation controller controls the corresponding detection switch to turn off, and the low-power AC power supply no longer emits the energy The guide rail section is powered; at the same time, the commutation controller controls the corresponding power supply switch to turn on, so that the high-frequency inverter of the wireless power supply system is connected to the energy emitting guide rail section, and the energy emitting guide rail section of the wireless power supply system is in the power supply working state; otherwise , the commutation controller does not act, and the energy emitting guide rail section of the wireless power supply system is in the detection working state.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
一、本发明将无线供电系统发送端的各能量发射导轨段通过检测开关管与低功耗交流电源相连，从而在各能量发射导轨段增设一可与高频工作回路切换的低功耗检测支路。在高频工作回路断电时，低功耗检测支路工作，检测支路中的电压及电流检测装置实时检测出能量发射导轨段的电压及电流，并进而计算出能量发射导轨段的阻抗。当机车进入时，能量发射导轨段与机车底部的能量拾取线圈产生互感，其阻抗会变大；因此，测出能量发射导轨段的变大时，该能量发射导轨段的换流控制器判定机车进入该能量发射导轨段，并关断对应的检测支路、连通高频工作回路，该能量发射导轨段进入工作状态，对机车进行无线大功率供电，实现机车无线供电系统的分段导轨切换。它基于对分段导轨两端本身的电压及电流检测来实现受外界电磁场的影响小，并且其电压及电流检测装置可以安装在可屏蔽电磁场干扰的能量发射导轨段的双绞线连接段上，其信号检测的可靠性大大提高，能更准确、可靠地判断出机车动态运行时所在的分段导轨，其分段导轨的切换更加可靠。1. The present invention connects each energy emission guide rail section at the sending end of the wireless power supply system with a low-power AC power supply through a detection switch tube, thereby adding a low-power detection branch circuit that can be switched with a high-frequency working circuit in each energy emission guide rail section . When the high-frequency working circuit is powered off, the low-power detection branch works, and the voltage and current detection device in the detection branch detects the voltage and current of the energy emission guide rail section in real time, and then calculates the impedance of the energy emission guide rail section. When the locomotive enters, the energy emission guide rail section and the energy pick-up coil at the bottom of the locomotive will generate mutual inductance, and its impedance will become larger; Enter the energy emission guide rail section, turn off the corresponding detection branch, and connect the high-frequency working circuit. The energy emission guide rail section enters the working state to provide wireless high-power power supply to the locomotive, and realize the segment guide rail switching of the locomotive wireless power supply system. It is based on the voltage and current detection at both ends of the segmented guide rail to realize that it is less affected by the external electromagnetic field, and its voltage and current detection device can be installed on the twisted pair connection section of the energy emission guide rail section that can shield electromagnetic field interference. The reliability of the signal detection is greatly improved, and the section guide rail where the locomotive is dynamically running can be judged more accurately and reliably, and the switching of the section guide rails is more reliable.
二、只要有机车进入或离开，相应检测支路的阻抗就会有明显变化，因此，本发明的方法不仅适用于单个机车进入或离开分段导轨的情况，也适用于多个机车进入或离开分段导轨的情况。2. As long as the locomotive enters or leaves, the impedance of the corresponding detection branch will change significantly. Therefore, the method of the present invention is not only applicable to the situation where a single locomotive enters or leaves the segmented guide rail, but also applies to multiple locomotives entering or leaving The case of segmented rails.
上述的d步中的换流控制器计数器的次数阈值设置为3～5次。The number threshold of the commutation controller counter in the above step d is set to 3-5 times.
3～5次的重复，既能避免偶发干扰导致的误判，也能简单、快捷、准确的判断出机车的进入。Repeating 3 to 5 times can not only avoid misjudgment caused by occasional interference, but also determine the entry of locomotives simply, quickly and accurately.
下面结合附图和具体实施方式对本发明作进一步的详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
附图说明Description of drawings
图1是本发明实施例的分段导轨供电模式下实现各分段导轨间切换控制的示意图。FIG. 1 is a schematic diagram of switching control between each segmented guide rail in a segmented guide rail power supply mode according to an embodiment of the present invention.
具体实施方式Detailed ways
实施例Example
图1示出，本发明的一种机车无线供电系统的分段导轨切换方法，其具体做法是：Fig. 1 shows, a kind of segment guide rail switching method of locomotive wireless power supply system of the present invention, and its specific method is:
a、各能量发射导轨段6均通过检测开关管2b与低功耗交流电源3连接，初始时，各能量发射导轨段6的换流控制器1控制检测开关管2b处于导通状态，使低功耗交流电源3向能量发射导轨段6通入小电流；同时各能量发射导轨段6的换流控制器1控制供电开关管2a断开，使无线供电系统的高频逆变器8同能量发射导轨段6断开，无线供电系统各能量发射导轨段6均处于检测工作状态；a. Each energy emission guide rail section 6 is connected to the low-power AC power supply 3 through the detection switch tube 2b. Initially, the commutation controller 1 of each energy emission guide rail section 6 controls the detection switch tube 2b to be in a conducting state, so that the low power consumption The power consumption AC power supply 3 feeds a small current into the energy emission guide rail section 6; at the same time, the commutation controller 1 of each energy emission guide rail section 6 controls the power supply switch tube 2a to be disconnected, so that the high frequency inverter 8 of the wireless power supply system has the same energy The launch guide rail section 6 is disconnected, and each energy launch guide rail section 6 of the wireless power supply system is in the detection working state;
b、由各能量发射导轨段6两端并联的电压检测装置4检测能量发射导轨段6的两端电压的当前时刻瞬时值ut，并由各能量发射导轨段6上的电流检测装置5实时测量能量发射导轨段6的电流的当前时刻瞬时值it，其中下标t代表当前采样时刻的时间；b. The voltage detection device 4 connected in parallel at both ends of each energy emission guide rail section 6 detects the instantaneous value ut of the voltage at both ends of the energy emission guide rail section 6 at the current moment, and is real-time by the current detection device 5 on each energy emission guide rail section 6 Measuring the instantaneous valueit at the current moment of the current of the energy emission guide rail section 6, wherein the subscript t represents the time at the current sampling moment;
c、各能量发射导轨段6的换流控制器1接收电压检测装置4、电流检测装置5分别测得的电压当前时刻瞬时值ut和电流当前时刻瞬时值it，通过短时傅里叶变换算法，计算出电压当前时刻瞬时值ut和电流当前时刻瞬时值it的相量形式，并分别记为和换流控制器1再计算得出当前时刻的能量发射导轨段6的线阻抗Zt，记ZH为设定的能量发射导轨段6无机车驶入时的阻抗阈值，对任一能量发射导轨段6：c. The converter controller 1 of each energy emission guide rail section 6 receives the instantaneous value ut of the voltage at the current moment and the instantaneous valueit at the current moment of the current measured by the voltage detection device 4 and the current detection device 5 respectively, and passes the short-time Fourier transform Transform the algorithm to calculate the phasor form of the instantaneous value ut of the voltage at the current moment and the instantaneous value it of the current moment at the current moment, and record them as and The converter controller 1 then calculates the line impedance Zt of the energy emitting guide rail section 6 at the current moment, Denote ZH as the impedance threshold value of the set energy emission guide rail section 6 when no locomotive enters, and for any energy emission guide rail section 6:
若Zt≥Zt-1且Zt>ZH，则判断该能量发射导轨段6所在区间有机车进入的可能，换流控制器1的计数器次数加1，转d步；若Zt≤ZH，则判断该能量发射导轨段6所在区间无机车，换流控制器1的计数器次数置0，换流控制器1保持或恢复该能量发射导轨段6的检测工作状态；其中下标t-1代表前一采样时刻的时间；If Zt ≥ Zt-1 and Zt > ZH , it is judged that the section where the energy emission guide rail section 6 is located is likely to be entered by locomotives, and the number of times of the counter of the converter controller 1 is increased by 1, and then go to step d; if Zt ≤ ZH , it is judged that there is no locomotive in the section where the energy emission guide rail section 6 is located, the counter of the commutation controller 1 is set to 0, and the commutation controller 1 maintains or restores the detection working state of the energy emission guide rail section 6; where the subscript t -1 represents the time of the previous sampling moment;
d、若在设定的时间内，换流控制器1的计数器的次数达到设定的次数阈值，则换流控制器1控制相应的检测开关管2b关断，低功耗交流电源3不再向该能量发射导轨段6供电；同时换流控制器1控制相应的供电开关管2a开通，使无线供电系统的高频逆变器8与该能量发射导轨段6连通，无线供电系统的该能量发射导轨段6处于供电工作状态；否则，换流控制器1不动作，无线供电系统的该能量发射导轨段6处于处于检测工作状态。d. If within the set time, the number of times of the counter of the commutation controller 1 reaches the set threshold, the commutation controller 1 controls the corresponding detection switch tube 2b to turn off, and the low-power AC power supply 3 no longer Supply power to the energy emitting guide rail section 6; at the same time, the commutation controller 1 controls the corresponding power supply switch tube 2a to open, so that the high frequency inverter 8 of the wireless power supply system communicates with the energy emitting guide rail section 6, and the wireless power supply system The energy emitting guide rail section 6 is in the power supply working state; otherwise, the commutation controller 1 does not operate, and the energy emitting guide rail section 6 of the wireless power supply system is in the detection working state.
本例的d步中的换流控制器1计数器的次数阈值设置为3～5次。In step d of this example, the number threshold of the counter of the converter controller 1 is set to 3 to 5 times.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220383.3ACN104022581B (en) | 2014-05-22 | 2014-05-22 | A kind of sectional guide rail changing method of locomotive wireless power supply system |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220383.3ACN104022581B (en) | 2014-05-22 | 2014-05-22 | A kind of sectional guide rail changing method of locomotive wireless power supply system |
| Publication Number | Publication Date |
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| CN104022581Atrue CN104022581A (en) | 2014-09-03 |
| CN104022581B CN104022581B (en) | 2016-04-20 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410220383.3AActiveCN104022581B (en) | 2014-05-22 | 2014-05-22 | A kind of sectional guide rail changing method of locomotive wireless power supply system |
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| CN (1) | CN104022581B (en) |
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