Method for transforming fire coal power generator set into phase modifier and phase modifier

Abstract

The invention provides a method for transforming a fire coal power generator set into a phase modifier. The method comprises the following steps that firstly, a high-pressure cylinder rotor and a power generator rotor are flexibly connected; secondly, a medium-pressure cylinder of a steam turbine and a steam inlet and outlet port of a low-pressure cylinder are obstructed, and high-temperature andhigh-pressure steam of a boiler directly enters a high-pressure cylinder for acting; thirdly, exhaust steam of the high-pressure cylinder serves as the high-temperature end, one part enters a deaerator, the other part directly enters a condenser, and the input number of high-pressure heaters and the steam inlet volume of the high-pressure heaters are adjusted according to the running load; and fourthly, excitation system control parameters are adjusted, power generator runs in an overexcitation manner and outputs sensitive reactive power to a power grid or runs in an underexcitation manner and outputs capacitive reactive power to the power grid. The transformed phase modifier has the system function of participation in the power grid phase modulating process, and the problem that in the domestic power grid long-distance conveying process, the power grid dynamic reactive supporting capability is weakened is solved. Meanwhile, effective reutilization of the idle fire coal power generator set is achieved, and optimizing and upgrading of a traditional thermal power unit is achieved.

Description

technical field [0001] The invention relates to the technical field of coal-fired power generation, in particular to a method for transforming a coal-fired generating set into a condenser and the condenser. Background technique [0002] With the continuous operation of UHV DC transmission projects, my country's power grid has gradually entered the era of AC-DC hybrid transmission network. However, the contradiction of "direct strong and weak AC" in the regional power grid of the hub converter station is prominent, and the problem of weak reactive power support capacity is a major hidden danger to the safe and reliable operation of the power grid. In order to improve the reactive power support capability and stable operation capability of the AC-DC hybrid transmission network, the deployment and construction of large-capacity synchronous condenser units in the AC-DC hub station of the power grid has become an effective way to improve the reactive power support requirements of...

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Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes a method for transforming a coal-fired generator set into a phase regulator, transforming a coal-fired generator set into a phase regulator, so that it has the function of a phase modulation system that participates in the phase modulation process of the power grid, and solves the problem of the domestic power grid. The problem of the weakening of the dynamic reactive power support capacity of the power grid caused by the parallel operation of large-capacity AC and DC in the process of long-distance transmission

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