PMU transformation system suitable for energy storage auxiliary generator set frequency modulation

Abstract

The invention discloses a PMU transformation system suitable for energy storage auxiliary generator set frequency modulation, which comprises an auxiliary power system, an energy storage system and aPMU system; wherein the energy storage system is connected to the auxiliary power system through a first circuit breaker; the terminal voltage and current signals of a generator in the auxiliary powersystem are respectively collected by a first voltage transformer and a first current transformer and then sent to the PMU system; meanwhile, the voltage and current signals of the energy storage system are collected by a second voltage transformer and a second current transformer respectively and then sent to the PMU system. The PMU transformation system suitable for energy storage auxiliary generator set frequency modulation is simple in wiring mode, can realize multi-path measurement, is low in reconstruction operation and maintenance cost, high in synchronous sampling timing precision andfast in communication and data refreshing speed, can add output information of a generator set and a super capacitor and then upload the output information to a scheduling mechanism in real time and high precision, effectively improves primary frequency modulation response quality, meets assessment index requirements and improves economic benefits of power generation enterprises.

Description

technical field [0001] The invention relates to a PMU system, in particular to a PMU transformation system suitable for frequency regulation of energy storage auxiliary generating sets. Background technique [0002] In domestic thermal power plants, due to the influence of objective factors such as power supply coal quality fluctuations and low online measurement accuracy of the wind powder system, it is difficult for the control system to ensure the stability of the unit parameters when the load is raised and lowered at a relatively fast rate, and at the same time, the coal consumption and power consumption of the unit are aggravated. wear and tear. Although the current high-voltage throttling technology and multi-variable collaborative optimization system can greatly improve the rapid adjustment capability of the unit while taking into account the unit’s operational stability and long-term energy-saving benefits, the actual load changes of the unit and the grid’s primary f...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing PMU system wiring method cannot collect the output information of the supercapacitor, so that the improvement effect on the assessment index cannot be quantified when it assists a frequency modulation, and then fed back to the dispatching agency, thereby affecting the assessment and income of the power plant. , providing a PMU retrofit system suitable for frequency modulation of energy storage auxiliary generator sets. Its wiring method is simple, multi-channel measurement can be realized, the cost of retrofit operation and maintenance is low, and the synchronous sampling and timing accuracy is high, and the communication and data refresh speed are fast. The output information of generator sets and supercapacitors can be summed and uploaded to the dispatching organization in real time with high precision, effectively improving the quality of frequency modulation response, meeting the requirements of assessment indicators, and improving the economic benefits of power generation enterprises

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