First of all, you need to check whether this is caused by the generator itself, for example: insufficient turbine power, overheating of the generator bearings, insufficient technical water supply or blocked technical water supply. Again, check if this is due to the operating mode, such as phase leading operation, phase modulation operation, output limiting, etc. Third, check if this is due to system planning that limits generator power. Of course, the operating point of the generator does not necessarily operate under the rated working conditions. Sometimes it operates above rated working conditions, and sometimes below rated working conditions. These are very normal and specific problems that require detail. analysis.
Share on: Time added: 2012-6-26 15:07:41 Number of clicks: 783 The following presents the operagenerator phase modulation operation Generator phase modulation operation means that the generator. does not emit active power. The power is only used to provide the working state of inductive reactive power to the power grid, thereby regulating the system reactive power and maintaining the system voltage level. Phase modulated operation refers to the operating state in which the generator does not emit active power and provides inductive reactive power to the grid, thereby regulating the system power and maintaining the system voltage level. When the generator operates in phase modulation, it can operate either in overexcitation or underexcitation. During overexcitation operation, the generator emits inductive reactive power; during under-excitation operation, the generator emits capacitive reactive power. Generally, the functionPhase modulation means that the generator operates in an overexcited state, i.e. it emits inductive reactive power. Note: Hydrogenerators located far from the load center are generally not considered for phase modulation operation. Generator phase advance operation: During the operation of the power system, if there is excess reactive power, the system voltage will increase, affecting the normal operation of the system. At this time, the generator must be adjusted for. The working state advancing the phase to emit active power. Play the role of reducing system tension. Keep it in a stable working state, but when the generator works in phase, it will also have adverse effects. Factors that do not favor normal operation have been taken into account in the design of the generator set, allowing the generator to efperform phase advance operation for a short time. However, generator sets with different structures may have big differences. phase advance operation. Generally, once the generator starts to operate in phase advance, the magnetic leakage at the tip will increase compared to normal conditions. The tip rises steadily and vibrates, and the greater the depth of phase advance, the higher the final temperature. The adverse effects of running ahead of phase on the generator set are relatively complex and it takes a long time to find the problem. However, during maintenance, you should carefully check whether there are any abnormalities at the upper and lower ends of the sub-winding, the top of the core teeth, the metal bar notch and the finger part of pressure. So after the above analysis, everyone should understanddre what the phase modulation operation of the generator is!