A multi-type power supply coordinated control method and device restricted by steady-state overvoltage
A multi-type power supply, coordinated control technology, applied in the direction of AC network voltage adjustment, etc., can solve the problems of reactive power surplus, related bus voltage exceeding the limit, power flow back of the collection feeder, etc., to achieve the effect of optimizing coordination and cooperation and solving contradictions
Active Publication Date: 2022-07-01
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] like figure 1 As shown, a multi-type power supply coordinated control method restricted by steady-state overvoltage of the present invention includes the following steps:
[0072] Step 1: Obtain electromechanical transient simulation data through the dispatching data network, establish DC expected fault sets according to the technical guidelines for power system safety and stability control, and obtain equipment steady-state operating voltage limits and grid controllable resource pools according to station equipment performance.
[0073] Step 2: According to the expected DC fault set and the electromechanical transient simulation data, the time domain simulation is used to analyze the maximum unbalanced power amount that the power grid can bear under different DC faults to ensure the safe and stable operation of the power grid.
[0074] Step 3: According to the pre-established power grid controllable resource pool, obtain the power of all power sources in the controllab...
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The invention discloses a multi-type power supply coordinated control method and device constrained by steady-state overvoltage. Taking the steady-state voltage stability of the power grid after taking control measures for a DC fault as the control goal, the control cost sequence A, The total amount of control measures required for the power grid under DC fault to remove the comprehensive voltage boost sensitivity sequence B of different power source types, and to remove the comprehensive voltage boost sensitivity sequence S of the same power source type and different unit resources T Iterative adjustment is carried out to form the final switchable power supply control strategy; the invention solves the problem of coordination and cooperation of multiple types of measures, and adapts to the hierarchical and lean modern grid steady-state voltage control requirements.
Description
technical field [0001] The invention relates to a multi-type power supply coordination control method and device restricted by steady-state overvoltage, and belongs to the technical field of power system automation. Background technique [0002] With the development of the high proportion of new energy UHVDC transmission mode, the coupling relationship between UHVDC and new energy has become more and more closely. 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 sources, the system transient frequency, power angle and voltage problems that may be caused can be solved by taking the control measures of cutting machine. [0003] Without considering the action of AVC and other medium and long-term reactive power and voltage control systems, the problem of system steady-state vol...
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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