Integrated Control Method and System for Units Based on Grid Regional Control Deviation
A regional control deviation and comprehensive control technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problem of large main steam pressure fluctuations, too fast power adjustment speed, long-term instability of main steam pressure and temperature of the unit, etc. problem, to achieve the effect of reducing the fluctuation range, optimizing the assessment index, and improving the performance result
Active Publication Date: 2020-04-21
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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[0005] The embodiment of the present invention provides a unit comprehensive control method and system based on the regional control deviation of the power grid to solve the problems in the prior art that the main steam pressure fluctuates greatly due to too fast power adjustment rate, and the main steam pressure and temperature of the unit are unstable for a long time question
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[0046] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...
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The embodiment of the invention discloses a unit integrated control method and system based on the area control error of a power grid. The unit integrated control method based on the area control error of the power grid comprises the following steps: calculating the area control error ACE according to the power changes between interconnected power grids and the frequency changes of the power grids; obtaining the adjusting times of the unit according to the area control error ACE combined with a dead-time non-linear function of historical data of the power grid operation; obtaining the load adjustment range according to the adjusting times, and predicting the pressure variation of the main steam pressure of the unit caused by AGC adjusting; calculating the deviation value between the set value of the main steam pressure and the measured value of the main steam pressure of the unit, and performing summation operation on the deviation value and the predicted pressure variation to obtain the predicted fluctuation value of the main steam pressure; and controlling the unit adjustment speed according to the predicted fluctuation value of the main steam pressure. The invention judges the range of the action required by the unit and whether the energy of the unit is enough to ensure the performance of the adjustment or not in advance, and filters out unnecessary combustion adjustment atthe boiler side of the unit such as air, coal and water, so as to achieve the purpose of energy saving and consumption reduction.
Description
technical field [0001] The invention relates to the technical field of network source coordinated control, in particular to a comprehensive control method and system for generating units based on grid regional control deviation. Background technique [0002] Under the new situation of UHV power grid interconnection with regional power grids, power grids at all levels are increasingly connected, and the requirements for coordination and cooperation between power grids and generating units are also getting higher and higher. At the same time, my country's new energy installed capacity and power generation have increased rapidly, and the proportion of new energy installed capacity (wind power, photovoltaic, nuclear power) has increased from less than 16% at the end of 2016 to more than 18.5% at the end of September 2017. As of September 2017, the total installed capacity of new energy reached 275GW, and the newly installed thermal power accounted for only 33%, far lower than th...
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IPC IPC(8): H02J3/38H02J3/46
CPCH02J3/381H02J3/46
Inventor 李军苏建军王勇赵岩廖大鹏孟祥荣高嵩路宽庞向坤张用张辉李慧聪汪挺杜鹏程李娜颜庆
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY