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A parallel computing and analysis method technology, applied in computing, instrumentation, electrical and digital data processing, etc., can solve the problem that the computing speed cannot meet the online analysis, and achieve the effect of improving resource utilization and computing efficiency
Active Publication Date: 2015-04-08
STATE GRID CORP OF CHINA +1
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Since the calculation of the energy flow direction factor requires simultaneous Prony parameter identification and calculation of the active power and frequency components of multiple oscillation branches in the power grid, the current method is mainly based on the serial Prony calculation method. With the expansion of the grid scale, the traditional serial Prony calculation method is adopted. The calculation speed of the calculation method cannot meet the requirements of online analysis, and parallel calculation is required
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Embodiment 1
[0105] An online Prony analysis method based on dual parallel computing, the method comprises the following steps:
[0106] (a) In an AC interconnected grid consisting of I branches and J nodes, each branch and all nodes are equipped with a synchronous measurement unit PMU; the computing platform structure is as follows figure 1 As shown, the cluster consists of a client, a management node and C computing nodes, where C i Indicates the i-th computing node, P i for C i number of cores, C ij means C i The jth core in, i=1, 2, ..., C, j = 1, 2, 3, ..., P i ;
[0107] (b) When low-frequency oscillation occurs in the power grid, the E electrical quantities of M branches collected by the PMU include: active power ΔP, frequency Δω, take the same time period sampling data as a group and send them to the computing platform for Prony analysis, then The number of tasks to be analyzed is N=EM, M=1, 2, ..., I; each type of electrical quantity contains Len sampling data, 500≤Len≤3000...
Embodiment 2
[0140] (1) The wide-area measurement system uses the Prony analysis method to identify the active power and frequency data of 50 tie lines, which is equivalent to 100 Prony calculation tasks.
[0141] (2) There is one management node and two 8-core computing nodes C 1 、C 2 In the formed cluster, after the management node receives the task N=100 from the client, Prony parallel calculation is performed.
[0142] (3) The management node randomly selects a task from N tasks, and sends this task to C at the same time 1 and C 2 Calculate on the node and record the execution time of each node for the task. In this example C 1 The execution time is T 1 = 0.037s, C 2 The execution time is T 2 = 0.035s. According to T 1 / (T 1 +T 2 ) and T 2 / (T 1 +T 2 ) will N 1 = 51 tasks sent to C 1 Calculated on, N 2 = 49 tasks sent to C 2 Calculated on. by C 1 and C 2 Perform single-machine multi-thread parallel computing respectively.
[0143] (4)C 1 The number of tasks recei...
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technical field [0001] The invention relates to the field of power system schedulingautomation and the field of computer high-performance computing, and more specifically provides an online Prony analysis method based on double parallel computing, which can realize the analysis of multiple branches and multiple electrical quantities of the power grid during the low-frequency oscillation process of the power grid. Synchronous online parameter identification of . Background technique [0002] Under the disturbance of the power system, the relative swing between the rotors of the motor will occur and cause continuous oscillation in the absence of damping. The oscillation frequency ranges from 0.1 to 2.5Hz, so it is called low-frequency oscillation. The low-frequency oscillation problem belongs to the small-disturbance stability category. With the expansion of the interconnected power system, the commissioning of long-distance heavy-duty transmission systems, and the applicatio...
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