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Voltage out-of-limit adjusting method

A technology of voltage over-limit and adjustment method, which is applied in the direction of AC network voltage adjustment and reactive power compensation, which can solve problems affecting calculation accuracy and achieve the effects of overcoming defects and improving safety and reliability

Inactive Publication Date: 2012-07-04
STATE GRID SICHUAN ELECTRIC POWER +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In the sensitivity calculation, all sensitivity matrices need to be calculated. When the system is too large, it may affect the calculation accuracy

Method used

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Embodiment Construction

[0031] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0032] figure 1 It is a flow chart of the voltage over-limit adjustment method provided by the present invention. figure 1 Among them, a voltage over-limit adjustment method provided by the present invention includes:

[0033] Step 1: Obtain power flow section data and determine the nodes involved in voltage regulation in the power system.

[0034] Power flow section data is data available to power grid companies at all levels, and can be provided by power companies. The data format can be Excel or PSASP (Power System Analysis Software Package, power system analysis comprehensive program), etc. In the power system, if a node is equipped with regulating equipment such as a reactive power compensation device, a genera...

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PUM

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Abstract

The invention discloses a voltage out-of-limit adjusting method in the technical field of power supply system control. The voltage out-of-limit adjusting method comprises the following steps of: obtaining power flow interface data and determining nodes which take part in voltage adjustment; calculating power flow distribution of a power supply system according to the power flow interface data, so as to obtain voltage of each node; correcting and checking each node which takes part in the voltage adjustment, determining a voltage out-of-limit node and the voltage out-of-limit node with a maximum voltage out-of-limit value, and recording the node with the maximum voltage out-of-limit value as a node N*; carrying out sensitivity analysis on the node N*, calculating a reactive voltage sensitivity matrix of all the nodes which take part in the voltage adjustment to the node N*, and determining adjustment equipment taking part in the voltage adjustment; establishing a comprehensive sensitivity equation and calculating an adjustment amount of each adjustment equipment taking part in the voltage adjustment; adjusting each adjustment equipment taking part in the voltage adjustment according to the adjustment amount; calculating the adjusted voltage of each node; and if no voltage out-of-limit node exists, stopping adjusting. According to the voltage out-of-limit adjusting method disclosed by the invention, the adjustment capacity of the adjustable equipment can be rapidly and accurately calculated, and the security and the reliability of the power supply system are improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system control, and in particular relates to a method for adjusting a voltage exceeding a limit. Background technique [0002] During the actual operation of the power system, the voltage limit may occur. 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 off-limit node voltage to ensure the safe and stable operation of the power system. Commonly used voltage regulation measures include adjusting parallel reactive power compensation equipment, adjusting the reactive power output of generators, and adjusting the transformation ratio of on-load tap changer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 唐茂林庞晓艳张宏图袁贵川胡伟陈磊黄杨
Owner STATE GRID SICHUAN ELECTRIC POWER
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