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Positive sequence polarization voltage relay control analyzing method and system based on impedance plane

An analysis method and polarization voltage technology, applied in electrical components, emergency protection circuit devices, fault locations, etc., can solve problems such as the inability to quantitatively outline the relationship between distance protection action boundaries and calculated impedances

Active Publication Date: 2018-04-27
南京合智电力科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an analysis method and analysis system for the action behavior of relays, which are used to analyze the action behavior of distance relays, and then solve the current method of analyzing the action behavior of distance protection based on the impedance plane, which only has qualitative features and cannot be quantitatively outlined. Technical issues on the relationship between the action boundary of out-distance protection and the calculated impedance

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  • Positive sequence polarization voltage relay control analyzing method and system based on impedance plane
  • Positive sequence polarization voltage relay control analyzing method and system based on impedance plane
  • Positive sequence polarization voltage relay control analyzing method and system based on impedance plane

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Embodiment 1

[0067] Such as figure 1 As shown, this embodiment provides a method for analyzing the action behavior of the relay, that is, through the constructed impedance plane, the action behavior of the positive-sequence polarization voltage distance relay is analyzed.

[0068] Wherein, the relay described in this embodiment is specifically a positive-sequence polarization voltage distance relay, and includes but not limited to a positive-sequence polarization voltage grounding distance relay and a positive-sequence polarization voltage phase-to-phase distance relay. The action equation of the ground distance relay and the phase distance relay when the reverse direction is short-circuited.

[0069] The analysis method of the action behavior of the relay is because the secondary equipment such as general protection and wave recorder can record the data of 2 to 4 cycles before the system disturbance, and the wave recording file generated by the existing IED (Intelligent Electronic Device)...

Embodiment 2

[0116] On the basis of Embodiment 1, this embodiment provides a control method for a relay, such as Figure 4 As shown, the control method includes the following steps:

[0117] Step S1, establishing the action equation of the positive sequence polarization voltage distance relay based on the impedance plane;

[0118] Step S2, determine the action boundary of the distance relay according to the above action equation.

[0119] In this embodiment, the method for establishing the action equation of the positive-sequence polarization voltage distance relay based on the impedance plane in step S1 can be realized by using the analysis method of the relay action behavior as described in the first embodiment.

Embodiment 3

[0121] Such as Figure 5 As shown, on the basis of Embodiment 1, this embodiment provides a relay action behavior analysis system.

[0122] The relay action behavior analysis system includes:

[0123] The equivalent impedance calculation module is used to solve the equivalent impedance of each sequence subsystem; and

[0124] The action equation building block is used to establish the action equation of the positive sequence polarized voltage distance relay based on the impedance plane.

[0125] The analysis method and control method of the relay of the present invention are described in detail below by using PSCAD to build a system model; the positive and negative faults at the exit of the simulated busbar are both analyzed, and the positive sequence polarization voltage and the busbar polarization voltage are respectively analyzed on the impedance plane. The action of the distance relay.

[0126] In the first action situation, simulate a short circuit through a small tran...

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Abstract

The invention relates to an analysis method for analyzing the action behavior of a positive sequence polarization voltage distance relay based on an impedance plane. The analysis method comprises thestep that the action behavior of the positive sequence polarization voltage distance relay is analyzed through the constructed impedance plane. The step further comprises the steps that Sa when a power system fails, the power system is divided into positive, negative and zero sequence subsystems, and the equivalent impedance of each sequential subsystem is solved; and Sb, an action equation of thepositive sequence polarization voltage distance relay based on the impedance plane is established. The analysis method of the relay uses current and voltage data to calculate the positive, negative and zero sequence impedances of the system in real time, so that the behavior of distance protection can be analyzed point by point; the calculated zero, positive and negative sequence impedances of the system are accurate; and the change of one operating mode of the power system can be reflected in real time.

Description

technical field [0001] The invention relates to the technical field of transmission line distance relays, in particular to an analysis method for analyzing the action behavior of positive-sequence polarization voltage distance relays based on an impedance plane, and is suitable for positive-sequence polarization voltage grounding distance relays and positive-sequence polarization voltage phase-to-phase distance relays. Background technique [0002] Distance protection is a kind of protection widely used in medium and high voltage power system transmission lines. It has the characteristics of being less affected by changes in system operation mode and easy to set; it is also applicable to various systems (grounded or ungrounded), various fault types ( Symmetrical and asymmetrical faults, grounded and ungrounded faults). The essence of distance protection is to reflect the impedance value of the protection installation from the fault point, and judge whether the fault point is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26G01R31/08
Inventor 冯畅陈勇冯亚东
Owner 南京合智电力科技有限公司
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