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Control method of transformer station voltage for realizing comprehensive coordination of continuous device and discrete device

A voltage control method and equipment integration technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem that the magnitude and direction of reactive power cannot be fully reflected, so as to improve the ability to bear accident disturbance, The effect of improving safety

Inactive Publication Date: 2009-12-16
NORTH CHINA GRID +1
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Problems solved by technology

At the same time, only the Or the fixed upper and lower limits of Q cannot fully reflect the magnitude and direction of reactive power

Method used

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  • Control method of transformer station voltage for realizing comprehensive coordination of continuous device and discrete device
  • Control method of transformer station voltage for realizing comprehensive coordination of continuous device and discrete device
  • Control method of transformer station voltage for realizing comprehensive coordination of continuous device and discrete device

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Embodiment Construction

[0042] The substation voltage control method that realizes the comprehensive coordination of continuous equipment and discrete equipment proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments:

[0043] The method proposed by the present invention first forms a simplified equivalent model for the substation to be controlled, and its realization method is as follows: multiple parallel transformers can be regarded as one, and the reactive power of the high-voltage side, medium-voltage side and low-voltage side of the transformer is respectively recorded as Q h , Q m , Q l , multiple high-voltage buses are regarded as one high-voltage bus, and its voltage is denoted as V h , regard multiple medium-voltage buses as one medium-voltage bus, and record its voltage as V l , regard multiple low-voltage buses as one low-voltage bus, and record its voltage as V m , connect all synchronous condensers and capaciti...

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Abstract

The invention relates to a substation voltage control method for realizing comprehensive coordination of continuous equipment and discrete equipment, and belongs to the technical field of automatic voltage control of electric power systems. The method includes: collecting the real-time operation data of the substation to be controlled at the beginning of a control cycle; judging each collection amount based on preset expert rules, calculating the control amount for adjusting the gear of the transformer tap or determining the adjusted reactive power Compensation equipment; if it is to adjust reactive power compensation equipment, calculate the required total amount of reactive power adjustment ΔQg, and calculate the reactive power distribution between the ΔQg between the condenser and the capacitive reactance to obtain the reactive power set value of the condenser and the capacitive reactance sequence that needs to be switched; adjust the state of the substation equipment according to the obtained reactive power set value, the capacitive reactance sequence that needs to be switched, and the control amount of the transformer tap position to realize closed-loop control. The invention improves the ability of the power grid to bear accident disturbances and improves the safety of the power grid.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, in particular to a method for controlling substation coordinated voltage. Background technique [0002] Automatic Voltage Control (hereinafter referred to as AVC, Automatic Voltage Control) system is an important means to achieve power grid security (increase voltage stability margin), economy (reduce network loss), and high-quality (increase voltage pass rate) operation. Control the reactive power output of generators, transformer taps and reactive power compensation equipment to achieve a reasonable distribution of reactive power and voltage in the grid. [0003] The substation-oriented automatic voltage control is one of the key components to realize the automatic voltage control of the whole network. The main control means include switchable capacitors, reactors and on-load tap changer taps (hereinafter referred to as OLTC, On Load TapChanger) , th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G05B13/00
Inventor 孙宏斌宁文元郭庆来王蓓张伯明袁平吴文传贾琳王彬郑燕涛谢旭谢开雷为民
Owner NORTH CHINA GRID
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