Multi-resource coordination control method and apparatus for direct current block fault impact alternating current channel

A technology of coordinated control and DC blocking, applied in circuit devices, AC network circuits, power transmission AC networks, etc., can solve the problem of high cost of effective prevention and control of a single resource

Active Publication Date: 2018-02-23
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0010] In order to overcome the shortcomings of insufficient single resource effectiveness and excessive prevention and control cost in the above-mentioned prior art, the present invention provides a multi-resource coordinated control method and device for DC blocking fault impact AC channel, firstly determine the static stability limit of the AC channel; Then, according to the multi-resource coordination control model that satisfies the constraint conditions, the mu...

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  • Multi-resource coordination control method and apparatus for direct current block fault impact alternating current channel
  • Multi-resource coordination control method and apparatus for direct current block fault impact alternating current channel
  • Multi-resource coordination control method and apparatus for direct current block fault impact alternating current channel

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Embodiment 1

[0152] Embodiment 1 of the present invention provides a multi-resource coordination control method for a DC blocking fault impacting an AC channel. The specific process is as follows figure 1 As shown, it specifically includes the following steps:

[0153] S101: Determine the static stability limit of the AC channel;

[0154] S102: Determine the multi-resource coordination control sequence and coordination control amount according to the multi-resource coordination control model satisfying the constraint conditions; the multi-resource coordination control model includes an objective function constructed with the goal of minimizing load shedding, and the constraint conditions are based on the communication channel determined in S101 Static stability limit determination;

[0155] S103: Perform multi-resource coordinated control according to the multi-resource coordinated control sequence and coordinated control amount determined in S102.

[0156] In the above S101, the specifi...

Embodiment 2

[0279] Taking a certain target mode year in the North China Power Grid as an example, the specific process of the multi-resource coordination control method for the DC blocking fault impacting the AC channel is elaborated:

[0280] The structure diagram of the UHV AC / DC interconnection grid between North China and other regional grids in the future target year is as follows: figure 2 as shown, figure 2 The unit in it is 10,000 kilowatts. North China and Central China power grids are interconnected through UHV "Changzhi-Nanyang-Jingmen" (referred to as Changnan Line), and there are two operation modes: north transmission during wet season (transmission from Central China to North China) and south transmission during dry season. Send (transmit electricity from North China to Central China). The receiving power of UHV DC Shanglin and Zhaqing is 10 million kilowatts each, and the power of HVDC Yindong is 4 million kilowatts; the power of UHV DC outgoing to Xitai and Jinnan is 7...

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Abstract

The invention provides a multi-resource coordination control method and apparatus for a direct current block fault impact alternating current channel. Static state stability limit of the alternating current channel is determined firstly; then the multi-resource coordination control sequence and coordination control quantity are determined; and finally, multi-resource coordination control is realized. By virtue of the technical scheme provided by the invention, multiple types of control resources of pumping, storing and pump switching, direct current power emergency modulation, accurate load shedding, and load shedding are taken into comprehensive consideration, so that control means are increased; the target function of a multi-resource coordination control model takes the minimum of the load shedding quantity as the optimization object, and constraint conditions are taken into consideration, so that control effectiveness is improved, control cost is lowered, and power grid defensive performance is improved; and in addition, by adoption of a heuristic algorithm, the multi-resource coordination control sequence and the multi-resource coordination control quantity are obtained, and the multi-resource coordination control quantity obtained by adopting the heuristic algorithm is high in interpretability, so that relatively high practicability can be realized.

Description

technical field [0001] The invention relates to the technical field of ultra-high voltage direct current, in particular to a multi-resource coordination control method and device for direct current blocking faults impacting an alternating current channel. Background technique [0002] With the gradual construction and operation of large-capacity UHV DC, China has formed a larger-scale regional interconnection power system, but it is in the transition period of construction, and there are still relatively weak AC channels compared with strong DC. In the future, the power grid will invest in multiple outgoing and fed-in UHV DC lines, and some UHV AC connection sections will be relatively weak, showing the characteristics of strong direct and weak AC as a whole. If a DC blocking fault occurs, it will cause a large-scale power flow transfer, which may make the weak AC channel more stable and cause transient instability in the power grid, affecting the safe and stable operation o...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/06H02J3/38H02J3/24
CPCH02J3/386H02J3/06H02J3/24H02J3/36H02J2003/365Y02E10/76Y02E60/60
Inventor 陈得治袁森罗亚洲马世英宋云亭贾琳王青訾鹏张晨李轶群李再华李媛媛郑超吴丽华张鑫申旭辉张志强李立新袁珩迪
Owner CHINA ELECTRIC POWER RES INST
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