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Power equivalent simulation method of power grid static synchronous series compensator

A static synchronous and series compensation technology, applied in the field of value simulation, can solve the problem of inconvenient analysis and application of static synchronous series compensator system

Active Publication Date: 2021-02-23
HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the inconvenient problem of static synchronous series compensator in system analysis application

Method used

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  • Power equivalent simulation method of power grid static synchronous series compensator
  • Power equivalent simulation method of power grid static synchronous series compensator
  • Power equivalent simulation method of power grid static synchronous series compensator

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Embodiment 1

[0046] figure 1It is the system structure diagram of the static synchronous series compensator 1 of the power grid. The static synchronous series compensator 1 device is connected in series to the AC transmission line 2, and the static synchronous series compensator 1 device of each phase is composed of n H-bridge modules and a connecting reactor connected in series. . The phase voltage phasors at the beginning and end of the AC line are:

[0047]

[0048] where the amplitude and phase angle of the phase voltage at the first end of the line are V 1 and 0, the phase voltage amplitude and phase angle at the end of the line are V 2 and (-δ). The complex impedance of the transmission line itself is Z=z∠α=R+jX, where the line impedance amplitude and impedance angle are z and a respectively, R and X are the line resistance value and reactance value respectively, the connection of static synchronous series compensator 1 The reactor is included in the impedance of the transmiss...

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Abstract

The invention discloses a power equivalent simulation method for a static synchronous series compensator of a power grid. The method comprises the steps of calculating complex power of the head end and the tail end of an alternating current line where the static synchronous series compensator is located according to output voltage of the static synchronous series compensator and related parametersof a series power transmission line; taking the head ends and the tail ends of series power transmission lines of all static synchronous series compensators in a power grid as power flow nodes, and using equivalent active power and reactive power for simulating the static synchronous series compensators and the series power transmission lines thereof for power grid analysis or calculation. The method has the substantive effects that only two PQ nodes need to be used for simulating the static synchronous series compensator of the power grid and the series power transmission line of the staticsynchronous series compensator in alternating current system analysis, and corresponding analysis and calculation are facilitated.

Description

technical field [0001] This patent relates to the technical field of static synchronous series compensators, in particular to a power equivalent simulation method for static synchronous series compensators in power grids. Background technique [0002] Due to the characteristics of unbalanced distribution of grid power supply, network frame and load, etc., the power flow distribution of AC transmission lines is generally unbalanced. Some transmission lines are in heavy load operation state, while other transmission lines are in light load operation state. Some transmission lines will be in heavy-duty operation for a long time and become the weak link of the power grid. Once a failure occurs, it will seriously affect the safety and stability of the power grid. In order to deal with the above problems, an effective method is to actively control the transmission power of transmission lines through the construction and application of power flow controllers and other devices, and...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCH02J3/1814H02J2203/20Y02E40/10
Inventor 管敏渊沈建良楼平金国亮吴国强
Owner HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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