Multi-type power supply coordination control method and device restricted by steady-state overvoltage
A multi-type power supply and coordinated control technology, applied in the direction of AC network voltage adjustment, etc., can solve problems such as reactive power surplus, convergence feeder power flow back, related bus voltage limit, etc., to achieve the effect of solving contradictions and optimizing coordination and cooperation problems
Active Publication Date: 2021-05-14
NARI NANJING CONTROL SYST +2
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Problems solved by technology
[0003] Without considering the action of medium and long-term reactive voltage control systems such as AVC, the problem of system steady-state voltage exceeding the limit may be derived after taking measures to cut off the machine. Removal of large-capacity supporting new energy sources will cause a large amount of backflow of the converging feeder line. At the same time, considering that the reactive power compensation capacitors of the new energy stations are not removed synchronously, it will eventually lead to a large amount of reactive power and the related bus voltage will exceed the limit.
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Embodiment 1
[0071] Such as figure 1 As shown, a kind of multi-type power supply coordinated control method constrained by steady-state overvoltage of the present invention comprises the following steps:
[0072] Step 1. Obtain electromechanical transient simulation data through the dispatch data network, establish a DC predicted fault set according to the technical guidelines for power system safety and stability control, and obtain the steady-state operating voltage limit of the equipment and the controllable resource pool of the power grid according to the performance of the station equipment.
[0073] Step 2: According to the expected DC fault set and electromechanical transient simulation data, the maximum unbalanced power that the grid can withstand under different DC faults is analyzed through time domain simulation to ensure the safe and stable operation of the grid.
[0074] Step 3. According to the pre-established power grid controllable resource pool, obtain the power of all pow...
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The invention discloses a multi-type power supply coordination control method and device restricted by steady-state overvoltage. The multi-type power supply coordination control method comprises the steps of: taking the stability of the steady-state voltage of a power grid after a control measure is taken for a direct-current fault as a control target, iteratively adjusting the total amount of control measures PT required by the power grid under the direct current fault according to a control cost sequence A for cutting off the different power supply types of power supply resources, a comprehensive voltage rise sensitivity sequence B for cutting off the different power supply types of power supply resources and a comprehensive voltage rise sensitivity sequence S for cutting off the same power supply type of different unit resources to form a final cuttable power supply control strategy. According to the multi-type power supply coordination control method, the problem of coordination of multiple types of measures is solved, and hierarchical and lean modern power grid steady-state voltage control requirements are met.
Description
technical field [0001] The invention relates to a multi-type power supply coordinated control method and device subject to steady-state overvoltage, and belongs to the technical field of power system automation. Background technique [0002] With the development of the UHV DC external transmission mode with a high proportion of new energy, the coupling relationship between UHV DC and new energy is getting closer. At the same time, due to the reduction of the proportion of conventional units, the dynamic reactive power support capacity of the system is reduced. After the multi-type power supply collection type UHV DC blocking fault mainly supported by new energy, the possible transient frequency, power angle and voltage problems of the system can be solved by taking control measures to cut off the machine. [0003] Without considering the action of medium and long-term reactive voltage control systems such as AVC, the problem of system steady-state voltage exceeding the limit...
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IPC IPC(8): H02J3/12
CPCH02J3/12
Inventor 孙仲卿常海军万玉良刘福锁项颂王超吴坚李威黄畅想陈璐孙震宇刘鑫李兆伟王玉赵学茂朱玲郄朝辉
Owner NARI NANJING CONTROL SYST