技术领域：Technical field:
本发明涉及一种基于特征点的断路器操作机构线圈电流曲线重构方法。The invention relates to a method for reconstructing a coil current curve of a circuit breaker operating mechanism based on feature points.
背景技术：Background technique:
断路器是电力系统重要的一次设备，断路器性能的可靠性直接影响电力系统运行的可靠性，而断路器的可靠性主要取决于其操作机构的可靠性，且断路器操作机构机械故障为主要故障类型，因此对断路器操作机构机械故障进行诊断是非常重要的。断路器操作机构机械故障的诊断可以通过测量断路器的多种机械参数来完成，其中分合闸线圈电流信号是重要的监测参数之一。断路器操作机构分合闸电磁铁线圈的电流波形中含有很多状态信息，如铁芯运动机构有无卡滞、脱扣、释能机构负载变化的情况，断路器是否发生偷跳、拒动、误动等运行状态。The circuit breaker is an important primary equipment in the power system. The reliability of the circuit breaker performance directly affects the reliability of the power system operation, and the reliability of the circuit breaker mainly depends on the reliability of its operating mechanism, and the mechanical failure of the circuit breaker operating mechanism is the main Therefore, it is very important to diagnose the mechanical failure of the circuit breaker operating mechanism. The diagnosis of mechanical failure of the circuit breaker operating mechanism can be accomplished by measuring various mechanical parameters of the circuit breaker, among which the current signal of the opening and closing coil is one of the important monitoring parameters. The current waveform of the opening and closing electromagnet coil of the circuit breaker operating mechanism contains a lot of state information, such as whether the iron core movement mechanism is stuck, tripped, and the load of the energy release mechanism changes, whether the circuit breaker has a sneak trip, refusal to move, Operating status such as malfunction.
但由于各生产厂家在进行断路器操作机构性能测试时，所用的断路器监测系统各不相同，得到的原始数据格式也可能不同，有些生产厂家只提供具有几个关键特征点的测试报告给用户，用户得不到整个断路器操作机构分合闸线圈电流曲线的电子数据文档，因此目前技术限制了对断路器操作机构运行状态的进一步分析，所以对线圈电流波形进行重构在某些情况下是很有必要的。However, since each manufacturer uses different circuit breaker monitoring systems when performing performance tests on circuit breaker operating mechanisms, the original data formats obtained may also be different. Some manufacturers only provide test reports with a few key feature points to users. , the user cannot get the electronic data file of the opening and closing coil current curve of the entire circuit breaker operating mechanism, so the current technology limits the further analysis of the operating state of the circuit breaker operating mechanism, so the reconstruction of the coil current waveform is in some cases is very necessary.
发明内容：Invention content:
本发明的目的是提供一种高压断路器操作机构分合闸线圈电流曲线重构方法。The object of the present invention is to provide a method for reconstructing the current curve of the opening and closing coil of the operating mechanism of a high-voltage circuit breaker.
上述的目的通过以下的技术方案实现：Above-mentioned purpose realizes by following technical scheme:
一种基于特征点的断路器操作机构线圈电流曲线重构方法，该方法包括如下步骤：A method for reconstructing a coil current curve of a circuit breaker operating mechanism based on feature points, the method comprising the following steps:
（1）根据断路器操作机构动作特性测试设备检测得到操作机构分合闸线圈电流的波形曲线，通过分析断路器操作机构分合闸线圈电流波形变化情况，波形曲线具有6个拐点，把波形曲线分为5个变化阶段，从曲线上提取这6个拐点数据作为曲线的特征点数据，即线圈电流参数{I0，I1，I2，I3，I4，I5}和对应的时间参数{ t0，t1，t2，t3，t4，t5}；(1) The waveform curve of the opening and closing coil current of the operating mechanism is obtained according to the test equipment of the operating mechanism of the circuit breaker. By analyzing the current waveform change of the opening and closing coil of the operating mechanism of the circuit breaker, the waveform curve has 6 inflection points. It is divided into 5 change stages, and the 6 inflection point data are extracted from the curve as the characteristic point data of the curve, that is, the coil current parameters {I0, I1 , I2, I3,I4, I5 } and the corresponding time parameters {t0, t1, t2, t3, t4, t5 };
（2）断路器操作机构分合闸线圈电流曲线重构：(2) Reconstruction of the current curve of the opening and closing coil of the circuit breaker operating mechanism:
通过分析断路器操作机构分合闸线圈电流波形变化情况，断路器操作机构分合闸线圈电流每个阶段的曲线形成用一个曲线函数表示，下面根据6个特征点参数分5个阶段对断路器操作机构分合闸线圈电流曲线进行重构：By analyzing the current waveform change of the opening and closing coil of the circuit breaker operating mechanism, the curve formation of each stage of the opening and closing coil current of the circuit breaker operating mechanism is represented by a curve function. The circuit breaker is divided into 5 stages according to the 6 characteristic point parameters. The current curve of the opening and closing coil of the operating mechanism is reconstructed:
阶段4的曲线重构方法：通过分析阶段4的曲线形成过程，建立对应的近似曲线函数关系，根据提取的特征点（t3，I3）和（t4，I4），得出c4和b4，带入其近似曲线函数，完成阶段4的曲线重构；Curve reconstruction method in Stage 4: By analyzing the curve formation process in Stage 4, establish the corresponding approximate curve function relationship, and obtainc4 according to the extracted feature points (t3, I3 ) and (t4, I4 ). andb4 , bring into its approximate curve function, and complete the curve reconstruction of stage 4;
阶段1的曲线重构方法：通过分析阶段1的曲线形成过程，建立对应的近似曲线函数关系，其中，c1、b1表示电磁铁铁芯在第一个阶段的运动过程中线圈电流波形变化情况下的曲线参数，通过带入特征点参数（t0，I0）和（t1，I1）求取c1和b1，带入其近似曲线函数，完成阶段1的曲线重构；Curve reconstruction method in stage 1: by analyzing the curve formation process in stage 1, establish the corresponding approximate curve function relationship, wherec1 andb1 represent the change of coil current waveform during the movement of the electromagnet core in the first stage In the case of curve parameters,c1 andb1 are calculated by introducing the characteristic point parameters (t0, I0 ) and (t1, I1 ), and then brought into their approximate curve functions to complete the curve reconstruction of stage 1;
阶段2的曲线重构方法：通过分析阶段2的曲线形成过程，建立对应的近似曲线函数关系，其中，c2、b2表示电磁铁铁芯在第二个阶段的运动过程中线圈电流波形变化情况下的曲线参数，通过带入提取的特征点（t1，I1）和（t2，I2）可以得出c2和b2，带入其近似曲线函数，完成阶段2的曲线重构；Curve reconstruction method in stage 2: by analyzing the curve forming process in stage 2, the corresponding approximate curve function relationship is established, wherec2 andb2 represent the coil current waveform changes of the electromagnet core during the second stage of motion In the case of curve parameters,c2 andb2 can be obtained by bringing in the extracted feature points (t1, I1 ) and (t2, I2 ), which can be brought into their approximate curve functions to complete the curve reconstruction in stage 2 structure;
阶段3的曲线重构方法：通过分析阶段3的曲线形成过程，建立对应的近似曲线函数关系，其中，c3、b3和b4表示电磁铁铁芯在第三个阶段的运动过程中，线圈电流波形变化情况下的曲线参数，通过带入提取的特征点（t2，I2）和（t3，I3），得出c3和b3，带入其近似曲线函数，完成阶段3的曲线重构；Curve reconstruction method in stage 3: by analyzing the curve formation process in stage 3, the corresponding approximate curve function relationship is established, wherec3 ,b3 andb4 represent the movement process of the electromagnet core in the third stage, Curve parameters in the case of coil current waveform changes, by bringing in the extracted feature points (t2, I2 ) and (t3, I3 ), getc3 andb3 , bring them into their approximate curve functions, and complete the stage 3 curve reconstruction;
阶段5的曲线重构方法：通过分析阶段5的曲线形成过程，建立对应的近似曲线函数关系 ，其中，c5、b5表示电磁铁铁芯在第五个阶段的运动过程中线圈电流波形变化情况下的曲线参数，通过带入提取的特征点（t4，I4）和（t5，I5），得出c5和b5，带人其近似曲线函数，完成阶段5的曲线重构；Curve reconstruction method in stage 5: by analyzing the curve formation process in stage 5, establish the corresponding approximate curve function relationship , among them,c5 ,b5 represent the curve parameters of the electromagnet core in the fifth stage of the movement process of the coil current waveform change, by bringing in the extracted feature points (t4, I4 ) and (t5, I5 ), getc5 andb5 , take their approximate curve function, and complete the curve reconstruction of stage 5;
通过分别对上述对5个阶段断路器操作机构线圈电流的曲线重构，完成整个断路器操作机构线圈电流的曲线重构。By respectively reconstructing the above-mentioned curves of the coil currents of the circuit breaker operating mechanism in the five stages, the curve reconstruction of the coil current of the entire circuit breaker operating mechanism is completed.
所述的基于特征点的断路器操作机构分合闸线圈电流曲线重构方法，所述的阶段1的曲线重构是在t0~t1时间段，断路器操作机构分合闸线圈在t0时刻通电，线圈中有电流通过，由于此时电流不够大，所产生的磁通不够大，电磁铁产生的电磁力未达到铁芯动作的动作值，所以此阶段电磁线圈通电，但铁芯不动，线圈电感为常数，线圈电流按指数规律上升，阶段1的时间与控制电源电压及线圈电阻参数有关，其微分方程近似为指数函数曲线。In the method for reconstructing the current curve of the opening and closing coil of the operating mechanism of the circuit breaker based on the characteristic points, the curve reconstruction of the stage 1 is in the time period t0~t1, and the opening and closing coil of the operating mechanism of the circuit breaker is attimet0 When energized, there is current passing through the coil. Since the current is not large enough at this time, the generated magnetic flux is not large enough, and the electromagnetic force generated by the electromagnet does not reach the action value of the iron core action. Therefore, the electromagnetic coil is energized at this stage, but the iron core does not move. , the coil inductance is constant, the coil current rises according to the exponential law, the time of stage 1 is related to the control power supply voltage and the coil resistance parameters, and its differential equation is approximately an exponential function curve.
所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段2的曲线重构是在t1~t2时间段， t1时刻，线圈电流增加到所产生的电磁力能克服铁芯自身重力、运动摩擦力和弹簧反力等阻力而带动铁芯动作，随着铁芯的运动，磁路气隙不断减小，磁路磁阻减小，线圈电抗增大，使线圈电流按指数规律下降，其微分方程近似二次函数曲线。In the method for reconstructing the coil current curve of the operating mechanism of a circuit breaker based on characteristic points, the curve reconstruction of the stage 2 is in the time period t1~t2, at timet1 , the coil current is increased to the point where thegenerated electromagnetic force can overcome The resistance of the iron core itself, such as gravity, motion friction and spring reaction force, drives the action of the iron core. With the movement of the iron core, the air gap of the magnetic circuit decreases continuously, the reluctance of the magnetic circuit decreases, and the coil reactance increases, so that the coil current Declines according to the exponential law, and its differential equation approximates the quadratic function curve.
所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段3的曲线重构是在t2~t3时间段， t2时刻，铁芯运动速度达到最大，铁芯运动到位，端面撞到合或分闸锁扣装置停止运动，此阶段铁芯磁路磁阻不变，电抗不再增加，线圈电流又呈指数规律上升，其微分方程近似为指数函数曲线。In the method for reconstructing the coil current curve of the operating mechanism of a circuit breaker based on feature points, the curve reconstruction of the stage 3 is in the time period t2~t3, at timet2 , the movementspeed of the iron core reaches the maximum, and the movement of the iron core is in place , the end face hits the closing or opening locking device to stop moving. At this stage, the reluctance of the iron core magnetic circuit remains unchanged, the reactance no longer increases, and the coil current rises exponentially. The differential equation is approximately an exponential function curve.
所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段4的曲线重构是在t3~t4时间段，此阶段是阶段3的延续，线圈电流达到近视稳态，其方程近似为 ，其中R表示线圈电阻大小， U表示线圈两端的电压大小。In the method for reconstructing the coil current curve of the circuit breaker operating mechanism based on feature points, the curve reconstruction of the described stage 4 is in the time period t3~t4, this stage is the continuation of stage 3, and the coil current reaches the myopic steady state, Its equation is approximately , whereR represents the resistance of the coil,and U represents the voltage across the coil.
所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段5的曲线重构是在t4~t5时间段，该段为电流切断阶段，此阶段由于断路器辅助触头断开直流电源，辅助触头间产生电弧并迅速拉长，电弧电压升高，使电流减小，直到电弧熄灭，线圈电流减小为0，所以阶段5的近似方程近似为一条直线。In the method for reconstructing the coil current curve of the circuit breaker operating mechanism based on feature points, the curve reconstruction of the stage 5 is in the time period t4~t5, which is the current cut-off stage. In this stage, the circuit breaker auxiliary contact When the DC power supply is disconnected, an arc is generated between the auxiliary contacts and is elongated rapidly. The arc voltage increases and the current decreases until the arc is extinguished and the coil current decreases to 0. Therefore, the approximate equation of stage 5 is approximately a straight line.
有益效果：Beneficial effect:
1．本发明通过监测得到断路器操作机构正常运行及各种可能故障情况下分合闸线圈电流的原始数据，提取原始数据的特征点，根据断路器操作机构分合闸线圈电流波形变化情况，对断路器操作机构的分合闸线圈电流曲线进行分段重构。1. The invention obtains the original data of the opening and closing coil current of the operating mechanism of the circuit breaker under normal operation and various possible faults through monitoring, extracts the characteristic points of the original data, and according to the change of the current waveform of the opening and closing coil of the operating mechanism of the circuit breaker, the open circuit The current curve of the opening and closing coil of the operating mechanism of the switch is reconstructed in sections.
．本发明中C1，C2，C3分别表示电磁铁铁芯的运动过程中分合闸线圈电流波形变化情况下前3个阶段的指数系数，操作机构不同故障情况下其指数系数不同，因此C1，C2，C3对断路器分合闸线圈电流的重构很重要。通过分析断路器操作机构分合闸线圈电流前3个阶段的曲线具有指数变化规律，虽然只取了六个点来进行曲线的重构，但其误差不影响对曲线的进一步分析。． In the present invention,C1, C2, and C3 respectively represent the index coefficients of the first three stages under the condition of the opening and closing coil current waveform changes in the movement process of the electromagnet core, and the index coefficients are different under different fault conditions of the operating mechanism, soC1, C2, and C3 are very important to the reconstruction of the opening and closing coil current of the circuit breaker. By analyzing the curves of the opening and closing coil currents of the circuit breaker operating mechanism in the first three stages, they have an exponential change law. Although only six points are taken to reconstruct the curves, the errors do not affect the further analysis of the curves.
．本发明通过已知断路器操作机构分合闸线圈电流几个特征点的情况下，并根据断路器分合闸线圈电流变化规律分阶段地对断路器操作机构分合闸线圈电流曲线进行重构，为断路器运行状态的进一步分析提供了方便。． The present invention reconstructs the current curve of the opening and closing coil of the operating mechanism of the circuit breaker in stages according to several characteristic points of the opening and closing coil current of the operating mechanism of the circuit breaker, and according to the changing law of the current of the opening and closing coil of the circuit breaker , which provides convenience for further analysis of the operating state of the circuit breaker.
附图说明：Description of drawings:
附图1是本发明断路器操作机构分（合）闸线圈电流标准波形示意图。Accompanying drawing 1 is the schematic diagram of the current standard waveform of the opening (closing) switch coil of the operating mechanism of the circuit breaker of the present invention.
附图2是重构曲线和原曲线示意图。Accompanying drawing 2 is the schematic diagram of reconstruction curve and original curve.
具体实施方式：Detailed ways:
实施例1：Example 1:
一种基于特征点的断路器操作机构线圈电流曲线重构方法，该方法包括如下步骤：A method for reconstructing a coil current curve of a circuit breaker operating mechanism based on feature points, the method comprising the following steps:
（1）根据断路器操作机构动作特性测试设备检测得到操作机构分合闸线圈电流的波形曲线，通过分析断路器操作机构分合闸线圈电流波形变化情况，波形曲线具有6个拐点，把波形曲线分为5个变化阶段，从曲线上提取这6个拐点数据作为曲线的特征点数据，即线圈电流参数{I0，I1，I2，I3，I4，I5}和对应的时间参数{ t0，t1，t2，t3，t4，t5}；(1) The waveform curve of the opening and closing coil current of the operating mechanism is obtained according to the test equipment of the operating mechanism of the circuit breaker. By analyzing the current waveform change of the opening and closing coil of the operating mechanism of the circuit breaker, the waveform curve has 6 inflection points. It is divided into 5 change stages, and the 6 inflection point data are extracted from the curve as the characteristic point data of the curve, that is, the coil current parameters {I0, I1 , I2, I3,I4, I5 } and the corresponding time parameters {t0, t1, t2, t3, t4, t5 };
（2）断路器操作机构分合闸线圈电流曲线重构：(2) Reconstruction of the current curve of the opening and closing coil of the circuit breaker operating mechanism:
通过分析断路器操作机构分合闸线圈电流波形变化情况，断路器操作机构分合闸线圈电流每个阶段的曲线形成用一个曲线函数表示，下面根据6个特征点参数分5个阶段对断路器操作机构分合闸线圈电流曲线进行重构：By analyzing the current waveform change of the opening and closing coil of the circuit breaker operating mechanism, the curve formation of each stage of the opening and closing coil current of the circuit breaker operating mechanism is represented by a curve function. The circuit breaker is divided into 5 stages according to the 6 characteristic point parameters. The current curve of the opening and closing coil of the operating mechanism is reconstructed:
阶段4的曲线重构方法：通过分析阶段4的曲线形成过程，建立对应的近似曲线函数关系，根据提取的特征点（t3，I3）和（t4，I4），得出c4和b4，带入其近似曲线函数，完成阶段4的曲线重构；Curve reconstruction method in Stage 4: By analyzing the curve formation process in Stage 4, establish the corresponding approximate curve function relationship, and obtainc4 according to the extracted feature points (t3, I3 ) and (t4, I4 ). andb4 , bring into its approximate curve function, and complete the curve reconstruction of stage 4;
阶段1的曲线重构方法：通过分析阶段1的曲线形成过程，建立对应的近似曲线函数关系，其中，c1、b1表示电磁铁铁芯在第一个阶段的运动过程中线圈电流波形变化情况下的曲线参数，通过带入特征点参数（t0，I0）和（t1，I1）求取c1和b1，带入其近似曲线函数，完成阶段1的曲线重构；Curve reconstruction method in stage 1: by analyzing the curve formation process in stage 1, establish the corresponding approximate curve function relationship, wherec1 andb1 represent the change of coil current waveform during the movement of the electromagnet core in the first stage In the case of curve parameters,c1 andb1 are calculated by introducing the characteristic point parameters (t0, I0 ) and (t1, I1 ), and then brought into their approximate curve functions to complete the curve reconstruction of stage 1;
阶段2的曲线重构方法：通过分析阶段2的曲线形成过程，建立对应的近似曲线函数关系，其中，c2、b2表示电磁铁铁芯在第二个阶段的运动过程中线圈电流波形变化情况下的曲线参数，通过带入提取的特征点（t1，I1）和（t2，I2）可以得出c2和b2，带入其近似曲线函数，完成阶段2的曲线重构；Curve reconstruction method in stage 2: by analyzing the curve forming process in stage 2, the corresponding approximate curve function relationship is established, wherec2 andb2 represent the coil current waveform changes of the electromagnet core during the second stage of motion In the case of curve parameters,c2 andb2 can be obtained by bringing in the extracted feature points (t1, I1 ) and (t2, I2 ), which can be brought into their approximate curve functions to complete the curve reconstruction in stage 2 structure;
阶段3的曲线重构方法：通过分析阶段3的曲线形成过程，建立对应的近似曲线函数关系，其中，c3、b3和b4表示电磁铁铁芯在第三个阶段的运动过程中，线圈电流波形变化情况下的曲线参数，通过带入提取的特征点（t2，I2）和（t3，I3），得出c3和b3，带入其近似曲线函数，完成阶段3的曲线重构；Curve reconstruction method in stage 3: by analyzing the curve formation process in stage 3, the corresponding approximate curve function relationship is established, wherec3 ,b3 andb4 represent the movement process of the electromagnet core in the third stage, Curve parameters in the case of coil current waveform changes, by bringing in the extracted feature points (t2, I2 ) and (t3, I3 ), getc3 andb3 , bring them into their approximate curve functions, and complete the stage 3 curve reconstruction;
阶段5的曲线重构方法：通过分析阶段5的曲线形成过程，建立对应的近似曲线函数关系 ，其中，c5、b5表示电磁铁铁芯在第五个阶段的运动过程中线圈电流波形变化情况下的曲线参数，通过带入提取的特征点（t4，I4）和（t5，I5），得出c5和b5，带人其近似曲线函数，完成阶段5的曲线重构；Curve reconstruction method in stage 5: by analyzing the curve formation process in stage 5, establish the corresponding approximate curve function relationship , among them,c5 ,b5 represent the curve parameters of the electromagnet core in the fifth stage of the movement process of the coil current waveform change, by bringing in the extracted feature points (t4, I4 ) and (t5, I5 ), getc5 andb5 , take their approximate curve function, and complete the curve reconstruction of stage 5;
通过分别对上述对5个阶段断路器操作机构线圈电流的曲线重构，完成整个断路器操作机构线圈电流的曲线重构。By respectively reconstructing the above-mentioned curves of the coil currents of the circuit breaker operating mechanism in the five stages, the curve reconstruction of the coil current of the entire circuit breaker operating mechanism is completed.
实施例2：Example 2:
根据权利要求1所述的基于特征点的断路器操作机构分合闸线圈电流曲线重构方法，其特征是：所述的阶段1的曲线重构是在t0~t1时间段，断路器操作机构分合闸线圈在t0时刻通电，线圈中有电流通过，由于此时电流不够大，所产生的磁通不够大，电磁铁产生的电磁力未达到铁芯动作的动作值，所以此阶段电磁线圈通电，但铁芯不动，线圈电感为常数，线圈电流按指数规律上升，阶段1的时间与控制电源电压及线圈电阻参数有关，其微分方程近似为指数函数曲线。According to the characteristic point-based method for reconstructing the current curve of the opening and closing coil of the circuit breaker operating mechanism according to claim 1, it is characterized in that: the curve reconstruction of the stage 1 is in the time period t0~t1, and the circuit breaker operating mechanism The opening and closing coil is energized at timet0 , and there is current passing through the coil. Since the current is not large enough at this time, the generated magnetic flux is not large enough, and the electromagnetic force generated by the electromagnet does not reach the operating value of the iron core, so the electromagnetic force at this stage The coil is energized, but the iron core does not move, the coil inductance is constant, and the coil current rises exponentially. The time of stage 1 is related to the control power supply voltage and coil resistance parameters, and its differential equation is approximately an exponential function curve.
实施例3：Example 3:
根据实施例1所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段2的曲线重构是在t1~t2时间段， t1时刻，线圈电流增加到所产生的电磁力能克服铁芯自身重力、运动摩擦力和弹簧反力等阻力而带动铁芯动作，随着铁芯的运动，磁路气隙不断减小，磁路磁阻减小，线圈电抗增大，使线圈电流按指数规律下降，其微分方程近似二次函数曲线。According to the method for reconstructing the coil current curve of the circuit breaker operating mechanism based on the characteristic points described in Embodiment 1, the curve reconstruction of the stage 2 is that the coil current is increased to the generated value duringthe time period t1~t2, at timet1 The electromagnetic force can drive the iron core to move by overcoming the resistance of the iron core's own gravity, motion friction and spring reaction force. With the movement of the iron core, the air gap of the magnetic circuit decreases continuously, the reluctance of the magnetic circuit decreases, and the coil reactance increases. , so that the coil current decreases exponentially, and its differential equation approximates a quadratic function curve.
实施例4：Example 4:
根据实施例1所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段3的曲线重构是在t2~t3时间段， t2时刻，铁芯运动速度达到最大，铁芯运动到位，端面撞到合或分闸锁扣装置停止运动，此阶段铁芯磁路磁阻不变，电抗不再增加，线圈电流又呈指数规律上升，其微分方程近似为指数函数曲线。According to the method for reconstructing the current curve of the circuit breaker operating mechanism coil current based on the feature points described in embodiment 1, the curve reconstruction of the stage 3 is in the t2 ~ t3 time period,att2 time, the iron core movement speed reaches the maximum, The iron core moves in place, and the end face hits the closing or opening locking device to stop the movement. At this stage, the reluctance of the iron core magnetic circuit remains unchanged, the reactance no longer increases, and the coil current rises exponentially. The differential equation is approximately an exponential function curve. .
实施例5：Example 5:
根据实施例1所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段4的曲线重构是在t3~t4时间段，此阶段是阶段3的延续，线圈电流达到近视稳态，其方程近似为 ，其中R表示线圈电阻大小， U表示线圈两端的电压大小。According to the method for reconstructing the coil current curve of the circuit breaker operating mechanism based on the feature points described in Embodiment 1, the curve reconstruction of the described stage 4 is in the time period t3~t4, this stage is the continuation of the stage 3, and the coil current reaches Myopic steady state, whose equation is approximated as , whereR represents the resistance of the coil,and U represents the voltage across the coil.
实施例6：Embodiment 6:
根据实施例1所述的基于特征点的断路器操作机构线圈电流曲线重构方法，所述的阶段5的曲线重构是在t4~t5时间段，该段为电流切断阶段，此阶段由于断路器辅助触头断开直流电源，辅助触头间产生电弧并迅速拉长，电弧电压升高，使电流减小，直到电弧熄灭，线圈电流减小为0，所以阶段5的近似方程近似为一条直线。According to the characteristic point-based method for reconstructing the current curve of the circuit breaker operating mechanism coil current described in Embodiment 1, the curve reconstruction of the described stage 5 is in the time period t4~t5, which is the current cut-off stage. When the auxiliary contact of the switch disconnects the DC power supply, an arc is generated between the auxiliary contacts and is elongated rapidly. The arc voltage rises and the current decreases until the arc is extinguished and the coil current decreases to 0. Therefore, the approximate equation of stage 5 is approximated as a straight line.
实施例7：Embodiment 7:
通过上述的方法可以提取线圈电流原曲线的6个特征点数据为（0,0），（1，2.7），（3,3），（4.5,3），（6,0），根据这六个特征点对线圈电流曲线进行还原，还原方法为实施例1所述内容。图2为原曲线和重构曲线的对比图，从图中可以看出，重构曲线能够比较好的把原始曲线的曲线特征重构出来，不影响曲线的进一步分析。Through the above method, the six characteristic point data of the original coil current curve can be extracted as (0,0), (1,2.7), (3,3), (4.5,3), (6,0), according to these six A characteristic point restores the coil current curve, and the reduction method is the content described in embodiment 1. Figure 2 is a comparison of the original curve and the reconstructed curve. It can be seen from the figure that the reconstructed curve can better reconstruct the curve characteristics of the original curve without affecting the further analysis of the curve.
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| CN201410591368.XACN104360261B (en) | 2014-10-29 | 2014-10-29 | The circuit breaker operation mechanism coil current curve Reconstruction method of distinguished point based |
| Application Number | Priority Date | Filing Date | Title |
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| CN201410591368.XACN104360261B (en) | 2014-10-29 | 2014-10-29 | The circuit breaker operation mechanism coil current curve Reconstruction method of distinguished point based |
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| CN104360261Atrue CN104360261A (en) | 2015-02-18 |
| CN104360261B CN104360261B (en) | 2017-12-01 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201410591368.XAActiveCN104360261B (en) | 2014-10-29 | 2014-10-29 | The circuit breaker operation mechanism coil current curve Reconstruction method of distinguished point based |
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