What is the critical load of the economic operation of the transformer?
Power consumption of power transformer critical load
First, the concept of economic operation and reactive power economic equivalent
Economic operation refers to the way in which the power consumption of the entire power system can be minimized and the best economic efficiency can be achieved.
The active loss of the power system is related not only to the active loss of the device but also to the reactive power loss of the device, since the reactive power consumed by the equipment is also supplied by the power system. Due to the presence of reactive power, the current in the system is increased, resulting in an increase in the active power of the power system.
Transformer manufacturing and economic operation
Transformer economic operation depends not only on the economic operation mode, but also depends on the transformer manufacturing level. According to the transformer often load can be divided into four cases: one is often at full load or close to full load operation of the transformer; the second is often running in most of the transformer; third is often running in a few half of the transformer; Load or no load operation of the transformer.
The current factory factory transformer, the economic load factor is mostly 40 ~ 60% range, the above four types of load are not fully adapted, especially for full load or light load operation of the transformer loss rate is great. Therefore, the proposed production of four types of transformers, the economic load rates were 90%, 65%, 40%, 20%. Each unit can be based on the load of the transformer to select the appropriate economic load factor of the transformer. In this way, the power units of the transformer can run in the economic operation area, you can save a lot of active power and reactive power
5. 2 Transformer update and economic operation
The purpose of the equipment update is simply not to eliminate its tangible wear, but also to eliminate its intangible wear. Only by constantly updating the way can we fundamentally reduce the equipment loss, improve efficiency, improve the technical backwardness.
Update the transformer will inevitably bring active power and reactive power savings. But to increase investment, there is also a recovery period of the problem. Transformers are not damaged after the update, but aging to a certain extent, but also have a certain value when you can update. Transformer manufacturers of different types, different capacity of the transformer life are provided, generally 20 years. The use of units in accordance with the provisions of the years to extract depreciation equipment, and the transformer update
In order to increase the amount of active loss caused by the active loss of the system in the power system, a conversion factor is introduced, that is, the reactive power economic equivalent. Reactive power economic equivalent, is that the power system to send 1kvar reactive power, the power system will increase the number of active power loss kw, the symbol kq, unit kw / kvar. This kq value and the power system capacity, structure and calculation of the specific location and other factors. For the factory substation, reactive power economic equivalent kq = 0.02 ~ 0.15;
Kq = 0.05 ~ 0.08; for the three or more transformer factory, take kq = 0.1 ~ 0.15 ~ 0.04; for the two-stage transformer factory, take kq = The
