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CN103532794A - Method for automatically switching stable control strategies based on warning signals of synchronous digital hierarchy equipment - Google Patents

Method for automatically switching stable control strategies based on warning signals of synchronous digital hierarchy equipment Download PDF

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CN103532794A
CN103532794A CN201310518764.5A CN201310518764A CN103532794A CN 103532794 A CN103532794 A CN 103532794A CN 201310518764 A CN201310518764 A CN 201310518764A CN 103532794 A CN103532794 A CN 103532794A
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control strategy
strategy
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power grid
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CN103532794B (en
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余文杰
倪明
薛禹胜
罗剑波
童和钦
赵丽莉
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nari Technology Co Ltd
Nanjing NARI Group Corp
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Abstract

本发明公开了一种基于同步数字体系设备告警信号的稳控策略自动切换方法，属于电力系统及其自动化技术领域。本发明将SDH设备的告警信号接入到稳定控制装置中，稳定控制装置接入SDH设备的告警信号后可以获取与其通信的多个通道的动态实时信息，即可依据稳控业务对通信误码、中断和延时的相关规定，对SDH设备告警信号的组合进行实时分析可判断通道是否处于可用状态。本发明避免了通道失效后部分稳控策略的控制措施可能无法可靠执行的缺陷，从本质上提高了区域安控系统的可靠性。

Figure 201310518764

The invention discloses an automatic switching method of a stable control strategy based on an alarm signal of a synchronous digital system device, and belongs to the technical field of electric power system and automation thereof. The present invention connects the alarm signal of the SDH equipment to the stability control device, and after the stability control device is connected to the alarm signal of the SDH equipment, it can obtain the dynamic real-time information of multiple channels communicating with it, and can correct the communication error bit according to the stability control service , Interruption and delay related regulations, real-time analysis of the combination of SDH equipment alarm signals can determine whether the channel is in an available state. The invention avoids the defect that some control measures of the stability control strategy may not be reliably executed after channel failure, and essentially improves the reliability of the regional security control system.

Figure 201310518764

Description

A kind of tactful automatic switching method of steady control based on synchronizing digital hierarchy equipment alarm signal
Technical field
The invention belongs to Power System and its Automation technical field, the present invention relates to more precisely a kind of tactful automatic switching method of steady control based on synchronizing digital hierarchy equipment alarm signal.
Background technology
In area stability control system (being region peace control system), between station, the general optical fiber that adopts communicates, A station and the B typical interior communication pattern of standing is: SDH (Synchronous Digital Hierarchy) (Synchronous Digital Hierarchy, hereinafter to be referred as the SDH) equipment at stability control device<-->2M multiplexed communications interface equipment<-->A station, A station<---optical fiber---SDH equipment<-->2M multiplexed communications interface equipment at-->B station<-->the B stability control device of standing.Be that stability control device will communicate by 2M multiplexed communications interface equipment and SDH equipment, SDH equipment arrives optical signal transmission by optical fiber the SDH equipment of offside, and then the 2M multiplexed communications interface equipment by offside is sent to information the stability control device of offside.
The control strategy of region peace control system is not all considered the situation of communication failure at present, when the scheduling meeting stability control device relevant to communication abnormality of stopping transport of ordering appears when abnormal in passage, if but find communication abnormality between stoppage in transit stability control device during this period of time in have the electric network fault of control measure, control measure may can not be carried out reliably because of communication abnormality, thereby cause system unstability.Stability control device conventionally only detects frame head postamble and verification and judges that whether passage is abnormal, whether abnormal standard is continuous a period of time (as 5 seconds) to can not receive signal in judgement communication, such criterion only can detect the catastrophe failure that passage interrupts and so on, for noncontinuity communication disruption or the error code of Millisecond, cannot detect.In fact, in electricity net safety stable automatics technical specification, clearly stipulated that the multiplexing fiber-optic passage error rate should be less than 10 -8, the control command that controlling center sends is no more than the communication performance indexs such as 20ms through multistage channel transfer to total time delay of afterbody actuating station device for optical-fibre channel.In addition also have other technical stipulation to be described in detail indexs such as error code degrade minute, Severely Errored Second, SES and residual BERs.
When current stabilization control device judges communication abnormality, all do not consider the performance index that these are relevant, the alarm signal of SDH equipment is combined and can obtain these performance index.Therefore the present invention considers the alarm signal of SDH equipment to be linked in the 2M multiplexed interface unit of stabilization control device for the performance of dynamic monitoring passage, and the main website of region stabilized control system can comprehensively implement the automatic switchover of control strategy according to the channel status of system thus.
Summary of the invention
The object of the invention is: overcome in prior art the defect that when communication abnormality appears in area stability control system, part control measure possibly cannot be carried out, provide a kind of running status automatic switchover system according to the alarm signal real-time judge passage of SDH (Synchronous Digital Hierarchy) (SDH) equipment surely to control tactful method.
Specifically, the present invention adopts following technical scheme to realize, and comprises the following steps:
1) according to the feature of target grid and contingency set, stability Calculation is carried out in the requirement based on power network safety operation, determines the Stable Control Strategy of target grid, is referred to as control strategy A;
2) route conditions of power telecom network synchronizing digital hierarchy equipment and optical-fibre channel in evaluating objects electrical network, critical passage group is determined in the consideration stable control measure of electrical network and the requirement to passage of stable business;
3) target grid is carried out under critical passage failure condition to time-domain-simulation, determine the Stable Control Strategy after critical passage lost efficacy, be referred to as control strategy B;
4) by the stability control device of the warning information access region peace control system of synchronizing digital hierarchy equipment, the control strategy A of target grid and control strategy B are deposited in Policy Table, during stability control device initialization, acquiescence adopts control strategy A simultaneously;
5) whether stability control device meets the requirement of time delay, error code and interruption according to the alarm signal of synchronizing digital hierarchy equipment and steady control business to the real-time judge passage that requires of dissimilar transmission channel, by delivering to higher level on channel status information, control plant stand simultaneously, if passage has, extremely proceed to step 6), otherwise proceed to step 7);
6) region peace control system controlling center judges whether to carry out the switching of control strategy according to the channel status information of system: when all control sub-stations are communicated by letter with controlling center while all losing efficacy, peace control system in region is out of service at once, when controlling center is during only with part control sub-station communication failure, put the to be switched sign of control strategy; When the channel part between control sub-station and actuating station lost efficacy, also put the to be switched sign of control strategy; When the passage between control sub-station and actuating station all lost efficacy, peace control system in region is out of service at once;
7) region is pacified control system controlling center according to real-time channel status, operational mode and is installed whether barring condition judges whether to change control strategy, if there is the to be switched sign of control strategy, the control strategy B that controlling center automatic search and current channel state and operational mode match, and current control strategy A is turned to control strategy B, if search, less than the control strategy matching, turns to control strategy A by current control strategy; If without the to be switched sign of control strategy, directly current control strategy is turned to control strategy A; Finally control strategy conversion command is sent to relevant control sub-station and actuating station;
8) whether region peace control system detection of grid there is the forecast failure in Policy Table, if fault having been detected occurs, stability control device carries out the search of traditional control strategy and implements then to turn to step 5) according to operational mode, fault type and channel status, if electrical network breaks down, does not directly turn to step 5) to carry out the communication of next round and search and the execution of electric network fault detection and control strategy.
Beneficial effect of the present invention is as follows: the present invention has gathered the warning information of SDH equipment for the real-time detection of region peace control system channel state, can be used for the quick switching of control strategy under channel failure condition, avoided channel failure rear section surely to control the defect that tactful control measure possibly cannot reliably be carried out, from having improved in essence the reliability of region peace control system.The warning information of stability control device of the present invention based on SDH equipment can be in several milliseconds the dynamic real time information of fast detecting passage, and the time of stability control device traditional detection channel failure generally needs about 5 seconds.
Accompanying drawing explanation
Fig. 1 is the flow chart one of the inventive method.
Fig. 2 is the flowchart 2 of the inventive method.
Embodiment
With reference to the accompanying drawings and in conjunction with example the present invention is described in further detail.
Fig. 1 and Fig. 2 are the flow charts of the inventive method.In Fig. 1, step 1) is according to the feature of target grid and contingency set, and stability Calculation is carried out in the requirement based on power network safety operation, determines the Stable Control Strategy of target grid, is referred to as control strategy A.
Step 2 in Fig. 1) route conditions of power telecom network synchronizing digital hierarchy equipment and optical-fibre channel in evaluating objects electrical network, critical passage group is determined in the consideration stable control measure of electrical network and the requirement to passage of stable business.
In Fig. 1, step 3) is carried out time-domain-simulation under critical passage failure condition to target grid, determines the Stable Control Strategy after critical passage lost efficacy, and is referred to as control strategy B.
In Fig. 1, step 4), by the stability control device of the warning information access region peace control system of synchronizing digital hierarchy equipment, deposits the control strategy A of target grid and control strategy B in Policy Table in simultaneously, and during stability control device initialization, acquiescence adopts control strategy A.
In Fig. 2, whether step 5) stability control device meets the requirement of time delay, error code and interruption according to the alarm signal of synchronizing digital hierarchy equipment and steady control business to the real-time judge passage that requires of dissimilar transmission channel, by delivering to higher level on channel status information, control plant stand and (on actuating station, deliver to control sub-station simultaneously, on control sub-station, deliver to controlling center), if passage has, extremely proceed to step 6), otherwise proceed to step 7).
In Fig. 2, step 6) region peace control system controlling center judges whether to carry out the switching of control strategy according to the channel status information of system: when all control sub-stations are communicated by letter with controlling center while all losing efficacy, peace control system in region is out of service at once, when controlling center is during only with part control sub-station communication failure, put the to be switched sign of control strategy; When the channel part between control sub-station and actuating station lost efficacy, also put the to be switched sign of control strategy; When the passage between control sub-station and actuating station all lost efficacy, peace control system in region is out of service at once.
In Fig. 1, step 7) region is pacified control system controlling center according to real-time channel status, operational mode and installs whether barring condition judges whether to change control strategy, if there is the to be switched sign of control strategy, the control strategy B that controlling center automatic search and current channel state and operational mode match, and current control strategy A is turned to control strategy B, if search, less than the control strategy matching, turns to control strategy A by current control strategy; If without the to be switched sign of control strategy, directly current control strategy is turned to control strategy A; Finally control strategy conversion command is sent to relevant control sub-station and actuating station.
In Fig. 1, whether step 8) region peace control system detection of grid there is the forecast failure in Policy Table, if fault having been detected occurs, stability control device carries out the search of traditional control strategy and implements then to turn to step 5) according to operational mode, fault type and channel status, if electrical network breaks down, does not directly turn to step 5) to carry out the communication of next round and search and the execution of electric network fault detection and control strategy.
Although the present invention with preferred embodiment openly as above, embodiment is not of the present invention for limiting.Without departing from the spirit and scope of the invention, any equivalence of doing changes or retouching, belongs to equally the present invention's protection range.Therefore should to take the application's the content that claim was defined be standard to protection scope of the present invention.

Claims (1)

1.一种基于同步数字体系设备告警信号的稳控策略自动切换方法，其特征在于，包括如下步骤： 1. a kind of steady control strategy automatic switching method based on synchronous digital system equipment warning signal, it is characterized in that, comprises the steps: 1）根据目标电网的特点和预想事故集，基于电网安全稳定运行的要求进行稳定计算，确定目标电网的稳定控制策略，称之为控制策略A； 1) According to the characteristics of the target power grid and the expected accident set, the stability calculation is carried out based on the requirements of safe and stable operation of the power grid, and the stability control strategy of the target power grid is determined, which is called control strategy A; 2）分析目标电网内电力通信网同步数字体系设备和光纤通道的路由条件，考虑电网的稳定控制措施和安稳业务的对通道的要求确定关键通道组； 2) Analyze the routing conditions of the synchronous digital system equipment and optical fiber channel of the power communication network in the target power grid, and determine the key channel group considering the stability control measures of the power grid and the channel requirements for stable business; 3）对目标电网在关键通道失效条件下进行时域仿真，确定关键通道失效后的稳定控制策略，称之为控制策略B； 3) Carry out time-domain simulation of the target power grid under the condition of critical channel failure, and determine the stable control strategy after the critical channel fails, which is called control strategy B; 4）将同步数字体系设备的告警信息接入区域安控系统的稳控装置，同时将目标电网的控制策略A和控制策略B存入策略表中，稳控装置初始化时默认采用控制策略A； 4) Connect the alarm information of the synchronous digital system equipment to the stability control device of the regional security control system, and store the control strategy A and control strategy B of the target power grid into the strategy table. The control strategy A is adopted by default when the stability control device is initialized; 5）稳控装置根据同步数字体系设备的告警信号和稳控业务对不同类型传输通道的要求实时判断通道是否满足时延、误码和中断的要求，同时将通道状态信息上送至上级控制厂站，若通道有异常则转入步骤6），否则转入步骤7）； 5) The stability control device judges in real time whether the channel meets the requirements of delay, bit error and interruption according to the alarm signal of the synchronous digital system equipment and the requirements of the stability control business for different types of transmission channels, and at the same time sends the channel status information to the superior control plant station, if there is an abnormality in the channel, go to step 6); otherwise, go to step 7); 6）区域安控系统控制主站根据系统的通道状态信息判断是否需要进行控制策略的切换：当所有控制子站与控制主站通信均失效时，则区域安控系统立刻退出运行，当控制主站仅与部分控制子站通信失效时，则置控制策略待切换标志；当控制子站与执行站之间的通道部分失效时，则也置控制策略待切换标志；当控制子站与执行站之间的通道全部失效时，则区域安控系统立刻退出运行； 6) The control master station of the regional security control system judges whether it is necessary to switch the control strategy according to the channel state information of the system: when all the communication between the control sub-stations and the control master station fails, the regional security control system immediately exits the operation, and when the control master When the communication between the sub-station and only part of the control sub-station fails, the flag of control strategy to be switched is set; When all the passages between are invalid, the area security control system will exit the operation immediately; 7）区域安控系统控制主站根据实时的通道状态、运行方式和装置是否闭锁条件判断是否需要转变控制策略，若有控制策略待切换标志，则控制主站自动搜索与当前通道状态和运行方式相匹配的控制策略B，并将当前的控制策略A转向控制策略B，若搜索不到相匹配的控制策略，则将当前控制策略转向控制策略A；若无控制策略待切换标志，则直接将当前控制策略转向控制策略A；最后将控制策略转换命令发送至相关的控制子站和执行站； 7) The regional security control system controls the master station to judge whether the control strategy needs to be changed according to the real-time channel status, operation mode and whether the device is blocked. If there is a control strategy to be switched flag, the control master station automatically searches for the current channel status and operation mode matching control strategy B, and switch the current control strategy A to control strategy B, if no matching control strategy can be found, then switch the current control strategy to control strategy A; if there is no control strategy to be switched flag, directly transfer The current control strategy turns to control strategy A; finally, the control strategy conversion command is sent to the relevant control sub-station and execution station; 8）区域安控系统检测电网是否发生策略表中的预想故障，若检测到有故障发生，则稳控装置根据运行方式、故障类型和通道状态进行传统控制策略的搜索和实施然后转向步骤5），若电网没有发生故障则直接转向步骤5）进行下一轮的通信及电网故障检测和控制策略的搜索与执行。 8) The regional security control system detects whether the expected fault in the strategy table occurs in the power grid. If a fault is detected, the stability control device searches and implements the traditional control strategy according to the operation mode, fault type and channel status, and then turns to step 5) , if there is no fault in the power grid, go directly to step 5) for the next round of communication and power grid fault detection and control strategy search and execution.
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