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A Method for Optimal Adjustment of Bus Voltage Based on Rapid Sensitivity Screening

A technology of bus voltage and adjustment method, which is applied in the field of electric power, can solve problems such as bus voltage exceeding the limit, achieve the effect of reducing the number of adjustment equipment and improving the utilization rate of equipment

Active Publication Date: 2019-12-13
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

This method aims at the shortcomings of the existing single sensitivity or optimization method to solve the bus voltage over-limit problem, and directly applies the sensitivity result to the optimization mathematical model, which reduces the difficulty of modeling, improves the calculation efficiency, and enhances the regulation economy.

Method used

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  • A Method for Optimal Adjustment of Bus Voltage Based on Rapid Sensitivity Screening
  • A Method for Optimal Adjustment of Bus Voltage Based on Rapid Sensitivity Screening
  • A Method for Optimal Adjustment of Bus Voltage Based on Rapid Sensitivity Screening

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Embodiment Construction

[0041] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] 1) According to the energy management system SCADA and PMU, real-time monitor whether the bus voltage has exceeded the limit, if so, continue to step 2, otherwise continue to monitor according to the cycle; 2) Calculate ΔV G with ΔV E Sensitivity between, ΔV G and ΔQ G (Sensitivity calculation only needs to be calculated once and stored in the database if the network structure does not undergo major changes); 3) Determine the comprehensive weighting factor of the sensitivity of the off-limit busbar, determine the comprehensive weighting factor of the sensitivity of the adjustable generator, and find Take the generator screening factor and use it to select the unit as the optimization object; 4) carry out optimization calculation; 5) use the optimization result to adjust the generator terminal voltage.

[0043] The present...

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Abstract

The invention provides a bus voltage optimizing and adjusting method based on sensitivity rapid screening, comprising the following steps: (1) monitoring the bus voltage in real time according to the cycle, and going to step (2) if the bus voltage is out of limit; (2) calculating the sensitivity relationship between the generator terminal voltage variation Delta VG and the load bus voltage variation Delta VE and the sensitivity relationship between the generator terminal voltage variation Delta VG and the generator reactive power output variation Delta QG; (3) getting the integrated sensitivity weighting factor AE of the out-of-limit bus; (4) getting the integrated sensitivity weighting factor BG of generators; (5) getting the screening factor FG of generators; (6) sorting all generators to be screened according to the screening factor from large to small, and selecting the first u units as optimization objects; and (7) carrying out optimization calculation, and adjusting the generator terminal voltage according to the optimization result. By introducing the sensitivity weighting factor of the out-of-limit bus and the sensitivity weighting factor and the screening factor of generators to screen generator units available for adjustment, the utilization ratio of equipment is improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for optimizing and adjusting bus voltage based on rapid sensitivity screening. Background technique [0002] During the actual operation of the power system, the bus voltage may exceed the limit. If the voltage is too low, it will increase the loss during power transmission, and if the voltage is too low for a long time, it may endanger the stability of the system; if the voltage is too high, it will damage the insulation, and the corona loss of the ultra-high voltage line will also increase. Therefore, a reasonable voltage regulation method should be adopted in time to adjust the over-limit bus voltage to ensure the safe and stable operation of the power system. [0003] The voltage correction algorithm mainly includes the optimal power flow method and the sensitivity method. The sensitivity method adopts the local linearization method to directly solve the qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12H02P9/00
CPCH02J3/12H02J2203/20H02P9/00
Inventor 徐鹏李峰冯树海於益军王勇王珂汤必强石飞刘俊王礼文李亚平刘建涛余斯航林文彬
Owner CHINA ELECTRIC POWER RES INST
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