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: 2008-09-17
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

[0026] 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:

[0027] 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 capacitiv...

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Abstract

The present invention provides a substation voltage control method of realizing comprehensive coordination of continuous equipment and discrete equipment, belonging to power system automatic voltage control technical field. The method includes following steps: collecting the real-time operation data of the substation to be controlled when the control cycle starts; judging each collecting variable based on the preestablished expert rules, calculating the tap joint gear position control variable of the regulating transformer or determining adjustment reactive-load compensation equipment; if is a adjustment reactive-load compensation equipment, the needed reactive-load adjusting variable delta Qg is calculated, the delta Qg processes reactive distribution calculation between a synchronous condenser and a capacitor reactance, the reactive set value of the synchronous condenser and the capacitor reactance sequence needed switch are calculated; the state of the transformer equipment is adjusted according to the obtained reactive set value and the capacitor reactance sequence needed switch and the tap joint gear position control variable of the transformer, realizing ring closed control. The invention improves ability of network bearing accident disturbance, improving the security of the network.

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 Applications(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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