阅读说明：本技术 一种电力系统中故障录波采样数据的同步方法及系统 (The synchronous method and system of failure wave-recording sampled data in a kind of electric system ) 是由 付国新 江晓亮 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种电力系统中故障录波采样数据的同步方法及系统,其特征在于,包括：分析并保存变电站各个合并单元的被打上硬件绝对时标的故障录波采样SV报文数据；选取基准合并单元,以基准合并单元的绝对时标作为同步时刻的绝对时标；根据同步时刻的绝对时标找出插值位置,计算同步时刻的插值数据,分别完成录波采样数据的同步插值。本发明不依赖全站同步信号,解决了数量众多的SV接入时,FPGA同步数据计算资源受限的问题,实现在非实时系统下的电力系统故障录波采样数据同步,提高采样数据的精确性和幅值的一致性,具有良好的应用前景。(The invention discloses the synchronous method and system of failure wave-recording sampled data in a kind of electric system characterized by comprising analyzes and save the failure wave-recording sampling SV message data for being labeled with hardware absolute time mark of each combining unit of substation；Benchmark combining unit is chosen, using the absolute time mark of benchmark combining unit as the absolute time mark of synchronization point；Location of interpolation is found out according to the absolute time mark of synchronization point, calculates the interpolated data of synchronization point, is respectively completed the synchronization interpolation of wave-recording sampling data.The present invention does not depend on whole station synchronization signal, when solving large number of SV access, the limited problem of FPGA synchrodata computing resource, realize the Power System Fault Record sampling data synchronization under non real-time system, the accuracy of sampled data and the consistency of amplitude are improved, is had a good application prospect.)

1. the synchronous method of failure wave-recording sampled data in a kind of electric system characterized by comprising

Analyze and save the failure wave-recording sampling SV message data for being labeled with hardware absolute time mark of each combining unit of substation；

Benchmark combining unit is chosen, using the absolute time mark of benchmark combining unit as the absolute time mark of synchronization point；

Location of interpolation is found out according to the absolute time mark of synchronization point, calculates the interpolated data of synchronization point, recording is respectively completed and adopts The synchronization interpolation of sample data.

2. one of according to claim 1 in electric system failure wave-recording sampled data synchronous method, which is characterized in that point The failure wave-recording sampling SV message data for being labeled with hardware absolute time mark of each combining unit of substation is analysed and saves, specifically Are as follows:

Each frame SV message is parsed, sample information is extracted, sample information includes absolute time mark and sampled value, is closed for each substation And unit distributes a SV deque, and sample information is stored in the tail of the queue of corresponding SV deque.

3. according to the synchronous method of failure wave-recording sampled data in the electric system of one of claim 2, which is characterized in that choosing Benchmark combining unit is taken, using the absolute time mark of benchmark combining unit as the absolute time mark of synchronization point, specifically:

Team's head node of all SV deques is scanned, the combining unit for therefrom choosing absolute time mark dispersion less than 1 microsecond is made For benchmark combining unit, using the absolute time mark of benchmark combining unit as the absolute time mark of synchronization point.

4. according to the synchronous method of failure wave-recording sampled data in the electric system of one of claim 3, which is characterized in that root Location of interpolation is found out according to the absolute time mark of synchronization point, specifically:

Synchronous location of interpolation is found out according to formula (1),

(t_syn-t'_k)×(t_syn-t'_k-1)≤0 (1)

Obtain the absolute time mark and sampled value of three sampled points of interpolation: (t'_k,x'_k)、(t'_k-1,x'_k-1)、(t'_k-2,x '_k-2), in which: t '_kFor k-th of sampling instant markers of certain combining unit, x '_kFor the sampling of k-th of sampling instant of certain combining unit Value；t′_k-1For -1 sampling instant markers of certain combining unit kth, x '_k-1For the sampling of certain -1 sampling instant of combining unit kth Value；t′_k-2For -2 sampling instant markers of certain combining unit kth, x '_k-2For the sampling of certain -2 sampling instant of combining unit kth Value.

5. one of according to claim 1 in electric system failure wave-recording sampled data synchronous method, which is characterized in that meter The interpolated data of synchronization point is calculated, specifically:

Synchronization point t is calculated according to second order interpolation formula (2)_synSampled data x_syn:

x_syn=x'_k×L_k+x'_k-1×L_k-1+x'_k-2×L_k-2 (2)

Wherein:

6. the synchronization system of failure wave-recording sampled data in a kind of electric system, which is characterized in that including one or more messages Acquisition unit, the recorder data processing unit being connect with message acquisition unit.

7. according to the synchronization system of failure wave-recording sampled data in the electric system of one of claim 6, which is characterized in that report Literary acquisition unit is FPGA message capture card, for acquiring substation's combining unit SV message, stamps hardware markers to SV message, And send recorder data processing unit to.

8. according to the synchronization system of failure wave-recording sampled data in the electric system of one of claim 6, which is characterized in that record Wave data processing unit is CPU, and CPU carries non-real time operating system.

9. according to the synchronization system of failure wave-recording sampled data in the electric system of one of claim 8, which is characterized in that CPU carries Linux non-real time operating system.

10. according to the synchronization system of failure wave-recording sampled data in the electric system of one of claim 7, which is characterized in that Message capture card embeds 8 ethernet controllers and 1 PCIE controller.

Technical field

The present invention relates to technical field of electric power automation, and in particular to failure wave-recording sampled data in a kind of electric system Synchronous method and system.

Background technique

In intelligent substation of electric power system, there are two types of schemes for failure wave-recording sample mode, and one is be based on external source (GPS Synchronizing device) synchronous source synchronized sampling, under this mode, all samplings, which all synchronize under the pulse per second (PPS) of GPS, is adopted Sample；Another kind is that synchronization is directly adopted in the end synchronous without external source, is sampled under the crystal oscillator beat of each leisure oneself.As electric power The oscillograph of system black box wants that both acquisition data can be accessed.When oscillograph accessed in a manner of point-to-point it is large number of Outside asynchronous-sampling when source data, oscillograph need to synchronize the sampled data from distinct device, realize system large disturbances such as The writing function of primary system voltage, electric power whens short trouble, system concussion, collapse of voltage etc. and its derived quantity.Because outer Source is large number of, and in order to which recording waveform can analyze the amplitude attenuation not less than 25 subharmonic no more than 5%, uses Largange second order interpolation, synchronous for interpolation, in order to meet the precision of recorder data, calculation amount is larger, if using FPGA Data processing is carried out, it is very high to the capacity requirement of FPGA, it will increase the cost of power system fault recorder.Therefore, urgently Need a kind of method for solving fault recorder data and synchronizing.

Summary of the invention

To solve deficiency in the prior art, the present invention provides a kind of synchronization of failure wave-recording sampled data in electric system Method and system are solved when existing Power System Fault Record device accesses the outer source data of large number of asynchronous-sampling and are used FPGA, which is synchronized, brings hardware cost excessively high and the inadequate problem of synchronization accuracy.

In order to achieve the above objectives, the present invention adopts the following technical scheme: failure wave-recording hits in a kind of electric system According to synchronous method, comprising:

Analyze and save the failure wave-recording sampling SV message for being labeled with hardware absolute time mark of each combining unit of substation Data；

Benchmark combining unit is chosen, using the absolute time mark of benchmark combining unit as the absolute time mark of synchronization point；

Location of interpolation is found out according to the absolute time mark of synchronization point, calculates the interpolated data of synchronization point, is respectively completed record The synchronization interpolation of wave sampled data.

Further, it analyzes and the failure wave-recording for being labeled with hardware absolute time mark for saving each combining unit of substation is adopted Sample SV message data, specifically:

Each frame SV message is parsed, sample information is extracted, it is each power transformation that sample information, which includes absolute time mark and sampled value, Combining unit of standing distributes a SV deque, and sample information is stored in the tail of the queue of corresponding SV deque.

Further, benchmark combining unit is chosen, using the absolute time mark of benchmark combining unit as the absolute of synchronization point Markers, specifically:

Team's head node of all SV deques is scanned, merging list of the absolute time mark dispersion less than 1 microsecond is therefrom chosen Member is used as benchmark combining unit, using the absolute time mark of benchmark combining unit as the absolute time mark of synchronization point.

Further, location of interpolation is found out according to the absolute time mark of synchronization point, specifically:

Synchronous location of interpolation is found out according to formula (1),

(t_syn-t'_k)×(t_syn-t'_k-1)≤0 (1)

Obtain the absolute time mark and sampled value of three sampled points of interpolation: (t'_k,x'_k)、(t'_k-1,x'_k-1)、(t'_k-2, x'_k-2), in which: t '_kFor k-th of sampling instant markers of certain combining unit, x '_kFor the sampling of k-th of sampling instant of certain combining unit Value；t'_k-1For -1 sampling instant markers of certain combining unit kth, x '_k-1For the sampling of certain -1 sampling instant of combining unit kth Value；t'_k-2For -2 sampling instant markers of certain combining unit kth, x '_k-2For the sampling of certain -2 sampling instant of combining unit kth Value.

Further, the interpolated data of synchronization point is calculated, specifically:

Synchronization point t is calculated according to second order interpolation formula (2)_synSampled data x_syn:

x_syn=x'_k×L_k+x'_k-1×L_k-1+x'_k-2×L_k-2 (2)

Wherein:

The synchronization system of failure wave-recording sampled data in a kind of electric system, which is characterized in that reported including one or more Literary acquisition unit, the recorder data processing unit being connect with message acquisition unit.

Further, message acquisition unit is that FPGA message capture card is given for acquiring substation's combining unit SV message SV message stamps hardware markers, and sends recorder data processing unit to.

Further, recorder data processing unit is CPU, and CPU carries non-real time operating system.

Further, CPU carries Linux non-real time operating system.

Further, message capture card embeds 8 ethernet controllers and 1 PCIE controller.

Advantageous effects of the invention: present invention employs based on high-precision hardware when the non real-time system of target adopt Sample synchronous method reduces the hardware cost of Power System Fault Record, improves data synchronization accuracy.

The present invention does not depend on whole station synchronization signal, and when solving large number of SV access, FPGA synchrodata calculates money The limited problem in source, realizes the Power System Fault Record sampling data synchronization under non real-time system, improves sampled data The consistency of accuracy and amplitude, has a good application prospect.

Detailed description of the invention

Fig. 1 is SV message acquisition system schematic diagram of the present invention；

Fig. 2 is the synchronous work flow diagram of data of the present invention；

Fig. 3 is data structure schematic diagram defined in data of the present invention synchronize.

Specific embodiment

The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention Technical solution, and not intended to limit the protection scope of the present invention.