The Control Method of Two Transformers Single Operating State Transition in Double Transformer System
An operating state, dual-transformer technology, applied in the direction of AC network voltage adjustment, etc., can solve the problems of personnel and equipment safety hazards, failure to achieve economic operation, hinder the development of unattended substations, etc., to save energy, control Simple and easy method
Active Publication Date: 2015-09-30
HUAINAN POWER SUPPLY CO OF STATE GRID ANHUI ELECTRIC POWER CORPORATIO
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Problems solved by technology
[0004] (1) Due to the strict conditions for the parallel operation of transformers, the accuracy of manual judgment is affected by many objective factors, such as the error of the instrument itself, the reading error, the time error, the electrical action error and the professional level of the staff. The reasons for avoiding the transformer can not be switched in time and accurately, the purpose of economic operation cannot be achieved, and even misoperation occurs due to misjudgment, which brings hidden dangers to the safety of personnel and equipment;
[0005] (2) This control mode of manual operation requires the full participation of the on-duty personnel, which hinders the development of unattended substations and makes it difficult for the substation and distribution system to achieve true automation
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[0046] See attached Figure 1 ~ Figure 3 , a control method for the transition of two transformers in a single operating state in a double transformer system, which is characterized in that, such as image 3 As shown, the dual-transformer power supply system includes a 10KV bus, the first high-voltage circuit breaker C1, the second high-voltage circuit breaker C2, the first 500kVA transformer T1, the second 500kVA transformer T2, the first low-voltage circuit breaker 1DL, and the second low-voltage circuit breaker 2DL And the third low-voltage circuit breaker 3DL, the 0.4kV I-section busbar and the 0.4kVII-section busbar; the 10KV busbar is connected to the first 500kVA transformer T1 through the first high-voltage circuit breaker C1, and the 10KV busbar is connected to the second 500kVA transformer T2 are connected through the second high-voltage circuit breaker C2; the 0.4kVI section bus and the first 500kVA transformer T1 are connected through the first low-voltage circuit ...
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The invention discloses a control method for converting independent operation states of two transformers in a double-transformer system. Closing / opening states of a first high-voltage breaker C1, a second high-voltage breaker C2, a first low-voltage breaker 1DL, a second low-voltage breaker 2DL, a third low-voltage breaker 3DL and the like of the double-transformer system are controlled, so that the double-transformer power supply system is converted between the independent T1 operation state and the independent T2 operation state; and the states of the double-transformer power supply system are monitored, and according to the monitored states, the system is adjusted to be maintained in the most economical operation state, thereby saving energy. The control method for converting the independent operation states of the two transformers in the double-transformer system has the advantages including that the double-transformer power supply system can be operated in the optimal energy-saving operation state after power delivery, the method is easy to implement, and energy can be saved.
Description
technical field [0001] The invention relates to a control method for the single operation state transition of two transformers in a double transformer system. Background technique [0002] For the power supply distribution room of large-scale enterprises, factories and mines, according to the load requirements, install 2 or more transformers to ensure the reliability of power supply. The low-voltage power supply usually adopts parallel connection of busbars. The normal operation mode is that each transformer supplies power independently, and each transformer has a high low-load rate and no-load rate according to its load characteristics. According to field measurement statistics, transformer energy loss caused by low load rate and no-load rate accounts for 15.6% of the actual monthly electricity consumption. During the operation of the transformer, if the day and night load changes greatly or the load changes greatly periodically, the number of transformers put into operati...
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IPC IPC(8): H02J3/14
Inventor 宋晓华唐旭明陶华春张兵朱文协杨兴汉
Owner HUAINAN POWER SUPPLY CO OF STATE GRID ANHUI ELECTRIC POWER CORPORATIO