1. Pay attention to the reasonable distribution of three-phase load
In the distribution of three-phase loads, power operators should carefully collect and record the relevant data in the practical operation, so as to be able to guess the status of the electricity load to a certain extent.
Secondly, it is possible to achieve a better three-phase balance distribution problem by installing balancing equipment. In some low-voltage three-phase four-wire system, the reactive power compensation equipment for adjusting the unbalanced current can be added to solve the various results of the unbalanced current phenomenon in the power grid that are often presented. Such a device can not only compensate for the reactive power of the system, but also adjust the effect of unbalanced active current.
In addition, according to the different conditions of the load moment in practice, the appropriate adjustment of the wiring method also has a certain impact on the reasonable distribution of the three-phase load.
2. The management method of unbalanced current in three-phase load
According to the compensation principle of unbalanced current acceptance, at any certain time, the unbalanced load of three phases is ungrounded, and each of them can be connected in parallel with the same resistance and capacitor. Therefore, under the guidance of the theory of unbalanced current management and electric acceptance, the equivalent of different properties can be analyzed to determine the interphase and relative reactive power compensation. When the distribution transformer is to compensate for the unbalanced current, the following criteria should be met:
First, there should be two contents for the management of the demand for current, one is to compensate the power factor, and the other is to regulate the three-phase current imbalance, which together determine the reactive power required for compensation.
The second point is that in the practical construction of the project, the all-inclusive management method should be selected to distinguish it from the inductance compensation to prevent serious overcompensation.
The third point is that the demand takes into account that the load will change over time, and according to this characteristic, the amount of compensation should also be adjusted appropriately according to the change of load.
The fourth point is reflected in the limitation of the number of switching times of equipment switching and compensation equipment, and the optimization plan of the whole day should be strategically handled during the design.
In short, when setting the amount of the share conditioning system, it is necessary to consider both the limitation of the power factor and the condition of the overcompensation limit.
3. Add the detection and adjustment of three-phase load
It is also necessary to carry out regular inspections of three-phase loads. After the reasonable distribution and control of the three-phase fit, the relevant part shall set up testing operations. The balance of power can not be absolute, can only be to achieve relative balance, in the practice of testing operations, each part should be based on the national and relevant parts of the balance of the measurement index as a standard, the results of the test are professionally recorded and analyzed, the load current of each phase is regularly tested, in order to find some three-phase imbalance in time.
When potential safety hazards are found in the detection process, adjustments and modifications should be made in time. Attention should also be exercised in areas where no problems were found during the testing process. After the end of the test, it is necessary not only to collect and analyze the data, but also to respond in a timely manner. The reaction here refers primarily to adjustments based on the inferred three-phase requirements from the test results, as well as speculation about the possibility of the new technology being used in the three-phase. After reasonable testing and in-depth analysis of the test results, we can prevent the appearance of imbalance to a greater extent and reduce the appearance of electricity accidents.
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