Configuration Method of Static Synchronous Compensator for UHVDC Weak Receiver Power Grid
A static synchronous compensation, UHV DC technology, applied in circuit devices, AC network circuits, flexible AC transmission systems, etc., can solve problems such as incomplete application of static synchronous compensators, achieve reasonable dynamic reactive power distribution, and easy calculation. , to ensure the effect of stable operation
Active Publication Date: 2019-06-21
STATE GRID CORP OF CHINA +2
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Problems solved by technology
As for the UHV DC weak receiving end grid, due to the differences in its grid structure and characteristics with the ordinary grid, the existing static synchronous compensator configuration method is not completely suitable for the UHV DC weak receiving end grid
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[0035] Such as figure 1 Shown is the flow chart of the method of the present invention: the configuration method of the static synchronous compensator of the UHV DC weak receiving end power grid provided by the present invention includes the following steps:
[0036] S1. Perform AC-DC hybrid simulation calculation for the UHV DC weak receiving end power grid system to be analyzed, and obtain the initial state quantity of the power flow of the power grid system;
[0037] S2. According to the initial state obtained in step S1, conduct a transient stability scan for three-phase short-circuit faults at the beginning and end of the AC line in the entire network to obtain the fault set, and calculate the limit removal time of the k-th unstable fault through simulation calculation, where k is positive integer;
[0038] S3. According to the fault set obtained in step S2, the following rules are used to judge:
[0039] If the fault set obtained in step S2 is an empty set, it indicate...
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The invention discloses a configuration method for a static synchronous compensator of an ultrahigh-voltage weak-direct-current receiving end power grid. The configuration method comprises the following steps: acquiring an initial tide state amount of the power grid to be analyzed; performing three-phase short-circuit failure transient-state stable scanning on the head end and tail end of a whole-network alternating-current circuit to obtain a failure set, and evaluating critical clearing time of a kth destabilization failure; judging the failure set; encoding an installing position and an installing capacity of the static synchronous compensator in the ultrahigh-voltage weak-direct-current receiving end power grid to be analyzed, and solving by using a particle swarm optimization algorithm to finish configuration of the static synchronous compensator. In the configuration method, the ultrahigh-voltage weak-direct-current receiving end power grid is taken as an analysis target, so that the elevation condition of a voltage support level after installation of the static synchronous compensator in the ultrahigh-voltage weak-direct-current receiving end power grid can be accurately reflected, the dynamic reactive distribution condition required by the system is reasonably analyzed, the alternating-current failure resistance of the system is improved, and stable running and optimal cost running of a power system are ensured; moreover, the method is simple and reliable, and is easy and convenient for calculation.
Description
technical field [0001] The invention belongs to the field of electrical automation, and in particular relates to a configuration method for a static synchronous compensator of an UHV DC weak receiving end power grid. Background technique [0002] Long-distance large-capacity UHVDC transmission is an important means to solve the problem of unbalanced energy distribution. UHV DC transmission can directly send the power from the energy base to the load center, which is conducive to the direct consumption of electric energy. Large-capacity DC power input requires a certain proportion of reactive power in the receiving grid. However, when the grid structure of the receiving grid is weak and the load level is not high, serious AC system failures will easily cause DC commutation failure. The lack of power causes great changes in the operating state of the AC system, resulting in voltage instability of the AC system. [0003] Traditional dynamic reactive power compensation equipme...
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IPC IPC(8): H02J3/18
CPCH02J3/1871Y02E40/10
Inventor 李梦骄章德肖帅陈耀红廖国栋谢欣涛侯益灵杨高才
Owner STATE GRID CORP OF CHINA