CN102025151A - Method for acquiring power flow cross section data of online operation state of power grid - Google Patents
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Abstract
The invention relates to a method for acquiring the power flow cross section data of the online operation state of a power grid, which comprises the following specific steps of: (1) automatically or manually acquiring a provincial power model subjected to state estimation and an online operation data cross section from an EMS dispatching automation system, and leading into a basic database of a power grid digital simulation system; (2) carrying out topology analysis and power flow calculation based on the online power grid model and operation data, and verifying the rationality of the online power flow; (3) integrating online data and offline data; and (4) automatically generating or generating the data of the online operation mode according to the user designated interval. The invention has the advantage that the operation of the digital simulation device based on the online mode can be realized, and the digital simulation device has the functions of parameter setting management, history mode storage and automatic/manual acquisition of the online mode. The analysis efficiency and the accuracy on the operation mode in the provincial dispatching center are greatly increased; and a reliable and accurate online operation mode covering the local power grid can be provided for the superior dispatching department.
Description
Technical field
The present invention relates to a kind of method of obtaining the trend profile data of electrical network on-line operation state, be applicable to provincial and the local level electrical network.
Background technology
Along with China's power system development, the particularly progressively enforcement of national network and extra-high voltage grid construction, each province's one-level scale of power will further enlarge.At present, one-level Utilities Electric Co. in each province's has possessed good dispatching automation basis, and EMS advanced applied software function has kept good log.Mode place in control centre's still adopts the power system analysis synthesizer (PSASP) of off-line as analysis tool, can not directly use online data but so far.Still rest on the basis of artificial input data and calculating owing to the off-line analysis program in this case, the data typing is not only loaded down with trivial details, amount is big, and can not in time reflect the actual operating mode of electrical network, cause the result of calculation and the actual conditions that draw that certain difference is arranged, its final result is to have influenced analysis efficiency and the correctness of mode place, control centre to operational mode.On the other hand, each big net is transferred and is economized phase modulation and continue and carried out the research and the project implementation of online dynamic security analysis and early warning control, comprise that state transfers the center, therefore objectively require traffic department of subordinate to provide reliably accurately, cover the on-line operation mode of this area electrical network for higher level traffic department.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of obtaining the trend profile data of electrical network on-line operation state.
The technical solution adopted for the present invention to solve the technical problems:
The present invention is on the basis of power system analysis synthesizer (PSASP) and dispatch automated system, by the online data interface with real-time data base, network topology analysis and the online data after introducing the EMS state estimation be incorporated in the PSASP database, make functional promotion that the trend calculating, transient stability analysis etc. of PSASP use to online level, realize the perfect adaptation of the online simultaneously and calculated off-line of PSASP.
The data of described real-time data base come from the real time data of SCADA system on the one hand, come from public data and the model library of PSASP on the other hand;
Described network topology analysis is meant: the data of SCADA system have comprised a large amount of switches and disconnecting link information, need carry out the network topology analysis, and cancellation switch and disconnecting link form the data that can be used for electrical network analysis calculating.Topological analysis is a utility module, is called by various computing modules such as state estimation, trends.
Described online data interface is meant: for not having the EMS system or do not have the area of state estimation operation, need directly and the SCADA system carries out data-interface; For EMS and the good area of state estimation ruuning situation are arranged, the online data interface function based on IEC61970 CIM/CIS/XML, E form and extended formatting is provided, realize that directly to use the EMS data PSASP is in linearize.
The concrete steps of trend profile data of obtaining electrical network on-line operation state are as follows:
(1) automatic or manual obtains provincial power network model, the on-line operation data section after the state estimation from the EMS dispatch automated system, imports in the basic database of electrical network Digital Simulation System;
(2) carry out topological analysis and trend calculating based on online electric network model and service data, verify online trend reasonability;
(3) carry out online and the off-line data integration;
(4) generate automatically or generate online running mode data by the interval of user's appointment;
Described online the integration with off-line data is by safeguarding and setting, regularly merge off-line/online electric network data that the current/historical electrical network operating mode of formation one cover reflection also can be carried out the calculated data of transient stability analysis, for online electrical network Digital Simulation provides data source;
Described method online and that off-line data is integrated is as follows:
A. based on off-line data, revise with online service data; Make the data after the integration, keep the original network configuration of off-line data, element title;
B. set up on-line element title mapping table, realize the shared of online/off-line data by described mapping table.
The invention has the beneficial effects as follows that using the present invention can realize that the Digital Simulation device moves based on online mode, and have that parameter is provided with management, historical mode is preserved, the function that the online mode automatic/hand obtains.Improved analysis efficiency and the accuracy of mode place, provincial control centre greatly to operational mode; Can be the on-line operation mode that higher level traffic department provides reliably accurately, covers this area electrical network.
Description of drawings
Fig. 1 is electric network data analogue system and dispatch automated system hardware configuration;
Fig. 2 is that electrical network off-line/at line model is by mapping table shared data schematic diagram;
Fig. 3 is that online data interface system data are integrated schematic diagram.
Embodiment
With the Hebei electrical network is example, and the method for trend profile data of obtaining Hebei electrical network on-line operation state is as follows:
On the basis of power system analysis synthesizer (PSASP) and dispatch automated system, by the online data interface with real-time data base, network topology analysis and the online data after introducing the EMS state estimation be incorporated in the PSASP database, make functional promotion that the trend calculating, transient stability analysis etc. of PSASP use to online level, realize the perfect adaptation of the online simultaneously and calculated off-line of PSASP.The hardware configuration (see figure 1) of electrical network Digital Simulation System and dispatch automated system online data interface, the major function of electrical network Digital Simulation System and dispatch automated system online data interface comprises:
(1) real-time data base
In order to improve the speed that the electric power system on-line analysis is calculated, need the exploitation real-time data base.The data of real-time data base come from the real time data of SCADA system on the one hand, come from public data and the model library of PSASP on the other hand.Real-time data base is public by the various on-line analyses calculating of PSASP.
(2) network topology analysis
The data of SCADA system have comprised a large amount of switches and disconnecting link information, need carry out the network topology analysis, and cancellation switch and disconnecting link form the data that can be used for electrical network analysis calculating.Topological analysis is a utility module, is called by various computing modules such as state estimation, trends.
(3) online data bank interface
For not having the EMS system or do not have the area of state estimation operation, need directly and the SCADA system carries out data-interface; For EMS and the good area of state estimation ruuning situation are arranged, the online data interface function based on IEC61970 CIM/CIS/XML, E form and extended formatting can be provided, realize that directly to use the EMS data PSASP is in linearize.
The concrete steps of trend profile data of obtaining electrical network on-line operation state are as follows:
(1) automatic or manual obtains Hebei electric network model, the on-line operation data section after the state estimation from the EMS dispatch automated system, imports in the basic database of electrical network Digital Simulation System;
(2) carry out topological analysis and trend calculating based on online electric network model and service data, verify online trend reasonability;
(3) integration of online and off-line data.
(4) generate automatically or generate online running mode data by the interval of user's appointment.
The described online and off-line data integration work of above-mentioned steps (3) is that important key link is calculated in on-line analysis.So-called data are integrated, be by certain maintenance and setting, can regularly merge off-line/online electric network data, form a nested structure complete, promptly and accurately reflect current/historical electrical network operating mode and can carry out the calculated data of transient stability analysis, for online electrical network Digital Simulation provides data source.
What the off-line of areal and online electric network model were described is the power system network of same reality, but in the ordinary course of things, being connected aspects such as situation, element title and parameter at scale of power, element at line model and off-line model has certain difference, needs to consider how the on-line operation data are reflected on the off-line model.
In the face of above-mentioned two cover electric network models, at first to analyze the characteristics of two sets of data, after taking into full account separately advantage, inferior position, the data of being done integrate be only correct, reasonably.
The characteristics of off-line data:
1) comprised complete relatively power transmission network data and stability Calculation required most of system model and parameter, data volume is big.
2) by a large amount of calculating and adjustment, stood the test of actual motion, have certain reliability;
3) generally do not have switch, disconnecting link information, different operational mode correspondences are overlapped off-line data more;
The characteristics of online data:
1) the ripe data after the real time data of SCADA system acquisition, the EMS state estimation;
The main foundation of 2) the daily supervision of dispatching of power netwoks personnel, control electrical network;
3) generally speaking, only having comprised the service data of voltage levels major network, is the part of off-line steady state data on the scale of power;
4) switch, disconnecting link information, real-time change are arranged.
From off-line/, determined the strategy of model integration in the characteristics separately of line model:
(1), revises with online service data based on larger off-line data;
(2) data after the integration have kept the original network configuration of off-line data, element title substantially;
(3) basis of model integration: set up on-line element title mapping table, realize the shared of online/off-line data by this mapping table.
Electric component title in above-mentioned two set of model all is metastable, and the online data interface can generate most mapping table content automatically by analyzing factory station, element annexation and element title.A small amount of element equivalent, that simplify needs artificial mapping to finish, and also has the not corresponding part of part to revise model itself.In setting up the process of mapping table, can also proofread and correct mutually by the difference between contrast two set of model, improving of on-line model all there is very big benefit.Off-line/pass through the mapping table shared data at line model, as shown in Figure 2.
In general on-line operation data and off-line data are not strict sections; The on-line operation Refresh Data to the off-line data after, need to adjust the service data of peculiar element in the off-line model, could guarantee data consistency, carry out subsequent analysis calculating.
The trend profile data that obtains electrical network on-line operation state adopts the data after the EMS dispatch automated system state estimation, has made full use of the data and the functional resources of existing dispatch automated system; Adopt intermediate data file as the mutual form of online data.At least comprise following content in the online data file:
1) physics bus
The busbar voltage amplitude.
2) AC line
Head end is meritorious, idle, terminal meritorious, idle.
3) shunt capacitance reactor
Idle.Capacitor is idle to be negative value, reactor is idle be on the occasion of.
4) two-winding transformer
High and low pressure side is meritorious, idle, tap position.
5) three-winding transformer
Senior middle school's downside is meritorious, idle, tap position.
6) generator
Meritorious, idle, voltage.
7) load
Meritorious, idle, voltage.
8) switch
On off state.1 representative is closed, and 0 representative is opened.
9) disconnecting link
The disconnecting link state.1 representative is closed, and 0 representative is opened.
The basic demand that Hebei Southern net on-line data are integrated is with the off-line model in the Hebei province and data are used in line model and real-time online data replaces, and keeps the integrality of Hebei outer net off-line data.Integration back calculation of tidal current and presence estimated result are consistent as far as possible, for electrical network Digital Simulation device analysis provides accurately, comprehensive data content.In addition, require interface routine can adapt to the additions and deletions of online or off-line model automatically in the integration process, and can reflect online change in topology.Online data interface system data are integrated schematic diagram as shown in Figure 3.
Transfer the offline mode data (can be based on a few cover typical datas, different time adopts different typical way data) provide based on Hebei province, onlinely obtain the CIM/XML/CIS operation of power networks data that Hebei province transfers to be provided, carry out trend and integrate.In the process that trend is integrated, will constantly revise the offline mode data, emphasis is data in the online mode data in the offline mode data and not.The target of integrating is to make operation information state basically identical after the state estimation that the online electric network swim after the integration provides with the scheduling center.
The design of online data integration function is as follows:
1) online data import feature
The user can select the CIM/XML data file of the Hebei Southern net of particular moment from man-machine interface, import in the PSASP7.0 online database, and can carry out pure online trend and calculate.
2) the automatic mapping function of on-line equipment
According to dynamic forming device mapping tables of information such as on-line device name, annexation, numbering, component parameters and artificial customizations, support the multi-to-multi mapping, support the mapping between the dissimilar equipment.
3) topological analysis function
Based in wiretap, disconnecting link position, carry out topological analysis, output is based on the electric network data that calculates bus.
4) the on-line model is replaced function automatically;
With the factory station is unit, on the basis of North China electrical network off-line data, replaces corresponding off-line part with online Hebei electric network data, and keeps the dynamic datas such as Zero sequence parameter, generator model parameter of the electric equipment of off-line.
5) outer net adjustment and trend are calculated
Adjust in the off-line model and online inconsistent part, adopt the adjustment of trend adjustment algorithm to generate electricity outside the province and load is exerted oneself, make that the inter-provincial interconnection trend after merging is consistent with on-line operation, data after the integration are tried one's best with the on-line operation mode mate.
Claims (1)
1. method of obtaining the trend profile data of electrical network on-line operation state,, it is characterized in that its concrete steps are as follows:
(1) automatic or manual obtains provincial or local level electric network model, the on-line operation data section after the state estimation from the EMS dispatch automated system, imports in the basic database of electrical network Digital Simulation System;
(2) carry out topological analysis and trend calculating based on online electric network model and service data, verify online trend reasonability;
(3) carry out online and the off-line data integration;
(4) generate automatically or generate online running mode data by the interval of user's appointment;
Described online the integration with off-line data is by safeguarding and setting, regularly merge off-line/online electric network data that the current/historical electrical network operating mode of formation one cover reflection also can be carried out the calculated data of transient stability analysis, for online electrical network Digital Simulation provides data source;
Described method online and that off-line data is integrated is as follows:
A. based on off-line data, revise with online service data; Make the data after the integration, keep the original network configuration of off-line data, element title;
B. set up on-line element title mapping table, realize the shared of online/off-line data by described mapping table.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102298671A (en) * | 2011-06-29 | 2011-12-28 | 河北省电力研究院 | Simulation method for realizing replay of grid fault |
| CN102496075A (en) * | 2011-11-08 | 2012-06-13 | 中国电力科学研究院 | Memory-based online data integration method |
| CN102521305A (en) * | 2011-12-01 | 2012-06-27 | 华中科技大学 | Data integration method for relay protection setting calculation |
| CN102567572A (en) * | 2011-12-07 | 2012-07-11 | 中国电力科学研究院 | Sand-table exercising system for power grid simulation |
| CN102722594A (en) * | 2011-11-29 | 2012-10-10 | 中国南方电网有限责任公司 | Method for integrating offline mode data and state estimation data |
| CN104090496A (en) * | 2014-07-15 | 2014-10-08 | 国家电网公司 | Smart grid control operation continuous analog simulation method |
| CN106407275A (en) * | 2016-08-26 | 2017-02-15 | 国家电网公司 | Data fusion-based power grid topology analysis method |
| CN106887842A (en) * | 2017-04-11 | 2017-06-23 | 广东电网有限责任公司电力调度控制中心 | A kind of bad data discrimination method based on XML/E format multiple-source electric network datas |
| CN107767028A (en) * | 2017-09-26 | 2018-03-06 | 广东电网有限责任公司电力调度控制中心 | A kind of transmission cross-section limit automatic identification based on xml and out-of-limit computational methods |
| CN109586272A (en) * | 2017-09-28 | 2019-04-05 | 中国电力科学研究院 | A kind of generation method and system of power grid continuous operation emulation section |
| CN109635350A (en) * | 2018-11-16 | 2019-04-16 | 海南电网有限责任公司电力科学研究院 | A kind of data replacement method that the trend section for emulation automatically generates and system |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298671A (en) * | 2011-06-29 | 2011-12-28 | 河北省电力研究院 | Simulation method for realizing replay of grid fault |
| WO2013000241A1 (en) * | 2011-06-29 | 2013-01-03 | 河北省电力研究院 | Simulation method for recurrence of power grid fault |
| CN102496075A (en) * | 2011-11-08 | 2012-06-13 | 中国电力科学研究院 | Memory-based online data integration method |
| CN102496075B (en) * | 2011-11-08 | 2015-11-11 | 中国电力科学研究院 | A kind of online data integration method based on internal memory |
| CN102722594A (en) * | 2011-11-29 | 2012-10-10 | 中国南方电网有限责任公司 | Method for integrating offline mode data and state estimation data |
| CN102722594B (en) * | 2011-11-29 | 2014-09-17 | 中国南方电网有限责任公司 | Method for integrating offline mode data and state estimation data |
| CN102521305A (en) * | 2011-12-01 | 2012-06-27 | 华中科技大学 | Data integration method for relay protection setting calculation |
| CN102567572A (en) * | 2011-12-07 | 2012-07-11 | 中国电力科学研究院 | Sand-table exercising system for power grid simulation |
| CN104090496A (en) * | 2014-07-15 | 2014-10-08 | 国家电网公司 | Smart grid control operation continuous analog simulation method |
| CN106407275A (en) * | 2016-08-26 | 2017-02-15 | 国家电网公司 | Data fusion-based power grid topology analysis method |
| CN106407275B (en) * | 2016-08-26 | 2019-07-26 | 国家电网公司 | A kind of power network topology analysis method based on data fusion |
| CN106887842A (en) * | 2017-04-11 | 2017-06-23 | 广东电网有限责任公司电力调度控制中心 | A kind of bad data discrimination method based on XML/E format multiple-source electric network datas |
| CN107767028A (en) * | 2017-09-26 | 2018-03-06 | 广东电网有限责任公司电力调度控制中心 | A kind of transmission cross-section limit automatic identification based on xml and out-of-limit computational methods |
| CN107767028B (en) * | 2017-09-26 | 2021-09-07 | 广东电网有限责任公司电力调度控制中心 | Transmission section limit automatic identification and out-of-limit calculation method based on xml |
| CN109586272A (en) * | 2017-09-28 | 2019-04-05 | 中国电力科学研究院 | A kind of generation method and system of power grid continuous operation emulation section |
| CN109635350A (en) * | 2018-11-16 | 2019-04-16 | 海南电网有限责任公司电力科学研究院 | A kind of data replacement method that the trend section for emulation automatically generates and system |
| CN109635350B (en) * | 2018-11-16 | 2024-01-05 | 海南电网有限责任公司电力科学研究院 | Data replacement method and system for automatically generating simulated power flow section |
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