Method for checking voltages
A voltage and calibration technology, applied in the direction of AC network voltage adjustment, etc., can solve problems affecting the execution effect of instructions, safety issues, etc., and achieve the effect of improving safety and reliability, and major economic and social benefits
Inactive Publication Date: 2013-03-20
TSINGHUA UNIV +1
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Problems solved by technology
Therefore, the automatic generation control system and the automatic voltage control system cannot be used as two completely independent closed-loop control systems, acting on an actual power system at the same time, nor can they be controlled simply by adopting the strategy of active power first and reactive power second
Otherwise, the interaction between AGC and AVC will inevitably affect the execution effect of their respective instructions, and may even cause security issues
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[0021] The voltage calibration method proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments.
[0022] According to the characteristics of mutual influence of active power flow and reactive power flow in the power system, the present invention introduces the idea of coordinated control in the automatic control theory into the power system, and can control the calculation result of AGC more accurately by checking the voltage of the AGC calculation result.
[0023] Such as figure 1 As shown, the voltage calibration method for AGC and AVC automatic coordination control system according to an embodiment of the present invention includes steps:
[0024] S1. Measure the real-time voltage, current, active power and reactive power of each bus node in the power system, and set the AGC command, that is, the active power output by each generator node in the power system at the kth sampling time since the samplin...
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The invention discloses a method for checking voltages and relates to the technical field of power system control. The method comprises the following steps: S1, measuring the real-time voltage, current, active power and reactive power of each bus node in a power system and configuring an automatic gain control (AGC) command; S2, according to the real-time data and network parameters of the power system measured in the S1, calculating the voltage amplitude of each selected bus node at an existing moment; and S3, comparing the set voltage amplitude of each selected bus node with the voltage amplitude of each selected bus node calculated in the S2, determining that the AGC command meets voltage requirements of the power system if the absolute value of the difference value is less than a set voltage offset index, and determining that the AGC command does not meet the voltage requirements of the power system if the absolute value of the difference value is more than or equal to the set voltage offset index. The method for checking the voltages which is used for an automatically coordinated control system of the AGC and automatic volume control (AVC) can be used to more accurately control the calculated result of the AGC by carrying out voltage checking on the calculated result of the AGC, and improve the safety and reliability of the power system.
Description
technical field [0001] The invention relates to the technical field of power system control, in particular to a voltage checking method for an AGC and AVC automatic coordination control system. Background technique [0002] In the current power system, Automatic Generation Control (AGC) and Automatic Voltage Control (AVC) have been widely used, and most of their research is based on the decoupling of active and reactive power. Assumption, does not consider the coordination problem between the two. However, the control objectives of the power system are diverse, and the control objects are scattered and complex. Although the active power and reactive power of the system are decoupled to a certain extent, they are not unrelated. The change of active output of the generator will inevitably affect the voltage quality and voltage stability of the system. At the same time, the adjustment of the transformer tap, the switching of the capacitor reactor, and the change of the genera...
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IPC IPC(8): H02J3/12
Inventor 孙建波胡伟李淼李小平王淑颖郑乐
Owner TSINGHUA UNIV