An optimization method for non-full-phase protection action performance of DC receiving-end condenser

An optimization method and protection action technology, applied to emergency protection circuit devices, electrical components, single-network parallel feeding arrangements, etc., can solve the problems of inability to recognize the non-full-phase state of low-reactive output down-regulation cameras, etc.

Active Publication Date: 2020-07-21
STATE GRID HUNAN ELECTRIC POWER +2
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  • Claims
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Problems solved by technology

[0007] In order to solve the problem that the current DC receiving-end concentrator modulation group cannot recognize the non-full-phase state of the low-reactive output down-regulating camera, the present invention provides an optimization method for the non-full-phase protection action performance of the DC receiving-end concentrator, including :

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  • An optimization method for non-full-phase protection action performance of DC receiving-end condenser
  • An optimization method for non-full-phase protection action performance of DC receiving-end condenser
  • An optimization method for non-full-phase protection action performance of DC receiving-end condenser

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] Xiangtan condenser is one of the first batch of 21 supporting condensers for UHV DC project. Figure 4 It is the main wiring diagram of a DC receiver condenser according to a preferred embodiment of the present invention, such as Figure 4 As shown, the 10kV standby section leads out two outgoing lines for the SFC start-up circuit. The circuit is equipped with a 10kV circuit breaker on the bus side of the 10kV standby section and the SFC incoming line side to avoid circuit breakers being tripped by long cables for protection on both sides. Xiangtan The phase controller unit adopts the unit wiring mode of "controller-transformer". The incoming lines of No. 1 and No....

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Abstract

The invention provides a method for optimizing the action performance of non-full-phase protection of a DC receiver concentrator, including: constructing an in-situ non-full-phase three-phase position inconsistency contact through the spare auxiliary contact of the three-phase position of the grid-connected switch; The non-full-phase three-phase position inconsistent contact is connected to the protection panel cabinet of the modulation group to form a local non-full-phase auxiliary signal. When the local non-full-phase main signal and the local non-full-phase auxiliary signal are switched on at the same time, the non-full-phase protection of the modulation group can satisfy the action condition and the outlet trip. Because the failure probability of the relay is low, the present invention can ensure that the non-full-phase protection of the modulation group reliably responds to the non-full-phase state of the condenser in most cases. However, when the local non-full-phase main signal and the local non-full-phase auxiliary signal have only one switch input, the current criterion is still required to block, that is, the reliability of the non-full-phase protection action of the modulation group will not be reduced, but it will be significantly improved. The ability of the non-full-phase protection of the modulation group to identify the non-full-phase state of the modulator.

Description

technical field [0001] The invention relates to the technical field of transformer group protection for condensers, in particular to a method for optimizing the operating performance of non-full-phase protection for condensers at DC receiving terminals. Background technique [0002] The condenser is generally used as a reactive power compensation device to adjust the reactive power of the power grid. Traditional condensers are generally rotating equipment, which have disadvantages such as large investment, high operating costs, complex structure, and difficult operation and maintenance of auxiliary systems. After the rapid development of power electronics technology, they were once replaced by static var compensation equipment such as SVC and STATCOM. [0003] In recent years, with the large-scale development of UHV DC transmission projects and the huge demand for temporary dynamic reactive power supporting capacity of the system in the "strong DC and weak AC" environment, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/50H02H7/04
CPCH02H7/04H02J3/50
Inventor 徐浩朱维钧刘海峰潘伟梁文武李辉李刚臧欣刘宇余斌吴晋波郭思源洪权
Owner STATE GRID HUNAN ELECTRIC POWER
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