the feed point of the motor, and en

the feed point of the motor, and endanger the normal operation of the motor. Therefore, if it is not for the more bearable load of the three-phase unbalanced distribution network, it will affect the overall security of the power system. Three-phase (or two-phase) caused by system failure. For example: single-phase or two-phase circuit breaker, single-phase ground fault. In this case, the system is allowed to run, and the problematic system must return to normal for a short time. Overload may lead to overheating of windings and overheating of transformer oil. The winding is overheated, the insulation aging is fast, and the transformer oil temperature increases and the oil quality deteriorates, which rapidly reduces the insulation performance of the transformer, shortens the transformer life (every 8 °C, the service life will be reduced by half), and even burns out the winding. The operation of three-phase unbalanced load will lead to higher temperature rise of zero-sequence current transformer and local metal components: for example, during the operation of three-phase unbalanced load, the transformer will inevitably produce zero-sequence current and zero-sequence current transformer; it produces a core of zero throughput, forming a ring transformer box wall or other metal components.However, in the design of distribution transformer, these metal elements do not take into account the magnetic conductive elements. Due to hysteresis and eddy current loss, the temperature of these components increases, which leads to the abnormal increase of local metal element transformers. In serious cases, it will cause transformer operation accident. Increased loss of unbalanced load transformer: nullThe loss of load transformer includes loss and load loss. Under normal circumstances, the working voltage of the transformer is basically unchanged, that is, no-load loss. The load loss of the transformer varies with the load and is proportional to the square of the load current. When the three-phase load is unbalanced, the load loss of the transformer can be regarded as a whole system of the load loss of the three-phase transformer. Mathematical theorem, if aBC is greater than or equal to 0, then aBC ≥ 33 aBC. When ABC, algebra, and ABC give the minimum: ABC=33 ABC. Therefore, we can assume that the loss of the three-phase transformer is: qa=ia2r,qbib2r,qci2r, where the secondary phase currents ia,ib,ic and r of the transformer are the phase resistors of the transformer. The expression of transformer loss is: qa qb qc ≥ 33 square [(ia2r) (ib2r) (ic2r)]. It can be seen that when the three-phase load and dead load are balanced, the loss of the transformer is the smallest. Operation loss of three-phase transformer: QAQQ3I2R, IBI, QAQQ3I2R;QA operation 3I2R9I2R3I2R maximum unbalanced transformer, IBI, IBI2R3I2R; when the above imbalance occurs, the concentrated phase current is too large (3 times increase) and the overload is too large, which may lead to winding overheating and transformer oil overheating. The winding is overheated, the insulation aging is fast, and the transformer oil is heated and deteriorated, which rapidly reduces the insulation performance of the transformer, reduces the service life of the transformer (8 °C per half-life), and even burns out the winding. When the three-phase unbalanced load is running, the zero sequence current transformer is too large and the local temperature rises metal. When the three-phase unbalanced load is running, the temperature rise of the transformer inevitably produces zero-sequence current, which exists in the current transformer, and the zero-sequence flux forms a circuit in the transformer core, the water tank wall of the transformer or other metal components. However, these metal elements are not considered in the design of magnetic permeability components of distribution transformers. The temperature of these elements increases due to magnetic hysteresis and eddy current loss, which leads to the abnormal increase of local metal element transformers. In serious cases, it will cause transformer operation accident. In the design of distribution transformer, the winding structure is designed according to the working conditions of balanced negative electrode.The performance of the winding is basically the same, and the rated capacity of each phase is the same. The maximum output power is limited by the rated capacity of each phase distribution transformer. When the distribution transformer works under unbalanced load, the load is lighter to meet the

the feed point of the motor, and endanger the normal operation of the motor. Therefore, if it is not for the more bearable load of the three-phase unbalanced distribution network, it will affect the overall security of the power system. Three-phase (or two-phase) caused by system failure. For example: single-phase or two-phase circuit breaker, single-phase ground fault. In this case, the system is allowed to run, and the problematic system must return to normal for a short time. Overload may lead to overheating of windings and overheating of transformer oil. The winding is overheated, the insulation aging is fast, and the transformer oil temperature increases and the oil quality deteriorates, which rapidly reduces the insulation performance of the transformer, shortens the transformer life (every 8 °C, the service life will be reduced by half), and even burns out the winding. The operation of three-phase unbalanced load will lead to higher temperature rise of zero-sequence current transformer and local metal components: for example, during the operation of three-phase unbalanced load, the transformer will inevitably produce zero-sequence current and zero-sequence current transformer; it produces a core of zero throughput, forming a ring transformer box wall or other metal components.However, in the design of distribution transformer, these metal elements do not take into account the magnetic conductive elements. Due to hysteresis and eddy current loss, the temperature of these components increases, which leads to the abnormal increase of local metal element transformers. In serious cases, it will cause transformer operation accident. Increased loss of unbalanced load transformer: nullThe loss of load transformer includes loss and load loss. Under normal circumstances, the working voltage of the transformer is basically unchanged, that is, no-load loss. The load loss of the transformer varies with the load and is proportional to the square of the load current. When the three-phase load is unbalanced, the load loss of the transformer can be regarded as a whole system of the load loss of the three-phase transformer. Mathematical theorem, if aBC is greater than or equal to 0, then aBC ≥ 33 aBC. When ABC, algebra, and ABC give the minimum: ABC=33 ABC. Therefore, we can assume that the loss of the three-phase transformer is: qa=ia2r,qbib2r,qci2r, where the secondary phase currents ia,ib,ic and r of the transformer are the phase resistors of the transformer. The expression of transformer loss is: qa qb qc ≥ 33 square [(ia2r) (ib2r) (ic2r)]. It can be seen that when the three-phase load and dead load are balanced, the loss of the transformer is the smallest. Operation loss of three-phase transformer: QAQQ3I2R, IBI, QAQQ3I2R;QA operation 3I2R9I2R3I2R maximum unbalanced transformer, IBI, IBI2R3I2R; when the above imbalance occurs, the concentrated phase current is too large (3 times increase) and the overload is too large, which may lead to winding overheating and transformer oil overheating. The winding is overheated, the insulation aging is fast, and the transformer oil is heated and deteriorated, which rapidly reduces the insulation performance of the transformer, reduces the service life of the transformer (8 °C per half-life), and even burns out the winding. When the three-phase unbalanced load is running, the zero sequence current transformer is too large and the local temperature rises metal. When the three-phase unbalanced load is running, the temperature rise of the transformer inevitably produces zero-sequence current, which exists in the current transformer, and the zero-sequence flux forms a circuit in the transformer core, the water tank wall of the transformer or other metal components. However, these metal elements are not considered in the design of magnetic permeability components of distribution transformers. The temperature of these elements increases due to magnetic hysteresis and eddy current loss, which leads to the abnormal increase of local metal element transformers. In serious cases, it will cause transformer operation accident. In the design of distribution transformer, the winding structure is designed according to the working conditions of balanced negative electrode.The performance of the winding is basically the same, and the rated capacity of each phase is the same. The maximum output power is limited by the rated capacity of each phase distribution transformer. When the distribution transformer works under unbalanced load, the load is lighter to meet the

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电动机的进料点，并危及电机的正常操作。因此，如果不是三相不平衡配电网络的更惬意的负载，它会影响到电力系统的整体安全性。三相（或两相）所造成的系统故障。例如：单相或两相的断路器，单相接地故障。在这种情况下，系统允许运行，并且有问题的系统必须恢复正常的时间很短。超载可能导致绕组过热和变压器油过热。过热的绕组，该绝缘老化是快速的，并且变压器油温度上升，油质劣化，从而迅速降低了变压器的绝缘性能，缩短了变压器寿命（每隔8°C，使用寿命将被减少半），甚至烧坏绕组。三相不平衡负载的动作将导致零序电流互感器和本地金属组分的较高的温度升高：例如，三相不平衡负载的操作期间，变压器不可避免地会产生的零序电流和零序电流互感器; 它产生零通量的芯，形成了一个环形变压器箱壁或其它金属components.However，配电变压器的设计中，这些金属元素不考虑磁性的导电元件。由于磁滞和涡流损耗，这些组件的温度升高，从而导致局部金属元素变压器的异常增加。在严重的情况下，它会导致变压器运行事故。负载不平衡变压器的损耗增加：负载变压器的nullThe损耗包括损耗和负载损耗。在正常情况下，变压器的工作电压为基本不变的，那就是，空载损耗。变压器的负载损耗随着负载而变化，并且正比于负载电流的平方。当三相负载不平衡时，变压器的负载损失可以被视为三相变压器的负载损耗的整个系统。数学定理，如果ABC是大于或等于0，然后ABC≥33 ABC。当ABC，代数和ABC得到的最小值：ABC = 33 ABC。因此，我们可以假设，三相变压器的损耗是：QA = ia2r，qbib2r，qci2r，其中所述次要相电流Ia，Ib，Ic和的r处的变压器是变压器的相电阻。变压器损耗的表达式为：QA QB QC≥33平方[（ia2r）（ib2r）（ic2r）]。由此可以看出，当三相负荷和静负荷平衡时，变压器的损耗最小。三相变压器的运行损耗：QAQQ3I2R，IBI，QAQQ3I2R; QA操作3I2R9I2R3I2R最大不平衡变压器，IBI，IBI2R3I2R; 当上述不平衡时，该浓相中电流过大（增加3倍）和过载过大，这可能会导致绕组过热和变压器油过热。过热的绕组，该绝缘老化是快速的，并且变压器油被加热和恶化，从而迅速降低了变压器的绝缘性能，降低了变压器（8°C每半衰期）的使用寿命，甚至烫伤出绕组。当三相不平衡负载运行时，零序电流互感器过大的局部温度升高的金属。当三相不平衡负载运行时，变压器的温度上升不可避免地产生零序电流，它存在于电流互感器，零序磁通形成的电路中的变压器铁芯，的水箱壁变压器或其它金属组分。然而，这些金属元素在配电变压器的导磁率部件的设计考虑。的这些元件由于磁滞和涡流损耗增加，温度而引起局部金属元素变压器的异常增加。在严重的情况下，它会导致变压器运行事故。在配电变压器的设计，绕组结构是根据的绕组的平衡负electrode.The性能的工作条件设计基本上是相同的，并且各相的额定容量是相同的。的最大输出功率是由每个相位分布变压器的额定容量的限制。当配电变压器不平衡负载下工作，负载较轻，以满足

正在翻译中..

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电机的进给点，危及电机的正常运行。因此，如果不是三相不平衡配电网的承载负荷，将影响电力系统的整体安全。由系统故障引起的三相（或两相）。例如：单相或两相断路器、单相接地故障。在这种情况下，允许系统运行，有问题的系统必须在短时间内恢复正常。过载可能导致绕组过热和变压器油过热。绕组过热，绝缘老化快，变压器油温升高，油质下降，迅速降低变压器的绝缘性能，缩短变压器寿命（每8°C，服务寿命将减少一半），甚至烧毁缠绕。三相不平衡负载的运行将导致零序列电流变压器和局部金属元件的温度升高：例如，在三相不平衡负载运行期间，变压器将不可避免地产生零序电流和零序列电流变压器;它产生零通量的核心，形成环形变压器箱壁或其他金属部件。然而，在配电变压器的设计中，这些金属元件没有考虑到磁导电元件。由于迟滞和涡流损失，这些元件的温度升高，导致局部金属元件变压器异常增加。严重的情况下，会导致变压器运行事故。不平衡负载变压器损耗增加：空负载变压器损耗包括损耗和负载损失。在正常情况下，变压器的工作电压基本不变，即无负载损耗。变压器的负载损耗随负载而变化，与负载电流的平方成正比。当三相负载不平衡时，变压器的负载损耗可视为三相变压器的负载损失整个系统。数学定理，如果aBC大于或等于0，则aBC = 33 aBC。当 ABC、代数和 ABC 给出最小值时：ABC=33 ABC。因此，我们可以假设三相变压器的损耗是：qa_ia2r、qbib2r、qci2r，其中变压器的次级相电流ia、ib、ic和r是变压器的相位电阻器。变压器损耗的表现形式是：qa qb qc = 33 平方 [（ia2r）（ib2r）（ic2r）]。可以看出，当三相负载和死载平衡时，变压器的损失最小。三相变压器运行损耗：QAQQ3I2R、IBI、QAQQ3I2R;QA操作3I2R9I2R3I2R最大不平衡变压器，IBI，IBI2R3I2R;发生上述不平衡时，集中相电流过大（增加3倍），过载过大，可能导致绕组过热和变压器油过热。绕组过热，绝缘老化快，变压器油加热变质，迅速降低变压器的绝缘性能，缩短变压器的使用寿命（每半衰程8°C），甚至烧坏变压器。绕组。当三相不平衡负载运行时，零序列电流变压器过大，局部温度升高金属。当三相不平衡负载运行时，变压器的温度上升不可避免地会产生直流电流，电流变压器中存在零序电流，零序通量在变压器芯、水箱壁中形成电路。变压器或其他金属部件。然而，在配电变压器的磁渗透性元件设计中，没有考虑到这些金属元件。由于这些元件的温度因磁迟滞和涡流损耗而升高，导致局部金属元件变压器异常增加。严重的情况下，会导致变压器运行事故。在配电变压器设计中，根据平衡负极的工作条件设计了绕组结构。绕组的性能基本相同，各相级的额定容量相同。最大输出功率受各相位分配变压器额定容量的限制。当配电变压器在不平衡负载下工作时，负载较轻，以满足

正在翻译中..

结果 (简体中文) 3:[复制]

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电动机的馈点，危及电动机的正常运行，因此，如果不是为了更能承受三相不平衡配电网的负荷，就会影响电力系统的整体安全。三相（或两相）系统故障引起的。例如：单相或两相断路器，单相接地故障，此时系统允许运行，故障系统必须短时间恢复正常，过载可能导致绕组过热，变压器油过热，绕组过热，绝缘老化快，变压器油温升高，油质恶化，迅速降低了变压器的绝缘性能，缩短了变压器寿命（每8℃降低一半寿命），甚至烧毁绕组，三相不平衡负载的运行会导致零序电流互感器和局部金属元件的温升升高，如在三相不平衡负载运行过程中，不可避免地产生零序电流和零序电流互感器产生一个零吞吐量的磁芯，形成环形变压器箱壁或其它金属元件。然而，在配电变压器的设计中，这些金属元件没有考虑到导磁元件。由于磁滞和涡流损耗，这些元件的温度升高，导致局部金属元件变压器异常增加，严重时会造成变压器运行事故，不平衡负荷变压器损耗增加：无负荷变压器损耗包括损耗和负载损耗，正常情况下变压器工作电压基本不变，即：，空载损耗。变压器的负载损耗随负载而变化，与负载电流的平方成正比。当三相负载不平衡时，变压器的负载损耗可视为三相变压器负载损耗的一个整体系统。数学定理，如果aBC大于或等于0，则aBC≥33 aBC。当aBC、代数和aBC给出最小值时：aBC=33 aBC。因此，我们可以假设三相变压器的损耗为：qa=ia2r，qbib2r，qci2r，其中二次相电流ia，ib，变压器的ic和r为变压器的相电阻，变压器损耗的表达式为：qa qb qc≥33平方[（ia2r）（ib2r）（ic2r）]，可见，当三相负载和恒载平衡时，变压器损耗最小；三相变压器的运行损耗为：qaq3i2r，IBI，qaq3i2r；qa操作3I2R9I2R3I2R最大不平衡变压器，IBI，IBI2R3I2R；当发生上述不平衡时，集中相电流过大（3倍增加），过载过大，可能导致绕组过热和变压器油过热。绕组过热，绝缘老化快，变压器油受热变质，迅速降低变压器绝缘性能，降低变压器使用寿命（半衰期8°C），甚至烧毁绕组，三相不平衡负载运行时，零序电流互感器过大，局部温度升高，当三相不平衡负载运行时，变压器的温升不可避免地会产生零序电流，零序电流在变压器铁芯中形成一个电路，变压器水箱壁或其他金属元件，但配电变压器磁导率元件的设计不考虑这些金属元件，由于磁滞和涡流损耗，这些元件的温度升高，导致局部金属元件变压器异常增多，严重时会造成变压器运行事故，在配电变压器设计中，根据平衡负电极的工作条件设计绕组结构，绕组性能基本相同，各相的额定容量相同，最大输出功率受各相配电变压器额定容量的限制。<br>

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