CN104392276A - Power distribution network evaluation planning method - Google Patents
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Abstract
The invention relates to a power distribution network evaluation planning method. The method specifically comprises three major steps of planning scheme formation, comprehensive evaluation and zonal statistics, and then the whole evaluation statistical method is completed at last. In the specific implementation process, data items used by the method are prepared firstly, and then comprehensive evaluation planning is started in an invoking order from planning scheme formation to comprehensive evaluation and to zonal statistics. The power distribution network evaluation planning method is mainly used for solving the problem of a new zonal partitioning way in the planning process. However, the problem can be discovered more visually by virtue of the comparison of results after the comprehensive evaluation so as to better direct the planning result.
Description
Technical field
The present invention relates to a kind of power distribution network assessment planing method, belong to power industry power distribution network assessment technology field.
Background technology
Power distribution network is the ingredient of electric system, whether power distribution network running well depends on the Plan and design whether science of power distribution network, whether economical rationality, for the power supply enterprise that fixed assets yield is huge, distribution network planning is operated in the survival and development of power supply enterprise and plays conclusive effect all the time, be the important base of power network development, its level and quality directly have influence on the security of mains supply, reliability and economy level.But the evaluation measures in existing electrical network in planning process mostly is each index classification to carry out, and comprehensively can not analyze consideration; Again because the definition and statistics increased different electricity consumption divisional type planned in directive/guide by new state's net " 12 ", original statistical will adjust.Need to modify to meet the planing method constantly changed to existing planing method based on above 2.
Traditional power distribution network assessment is mainly from individual event assessments such as reliability, security, power supply qualitys, and the mode that the method for this invention utilizes various index comprehensive to carry out weighing gives objective, comprehensive, comprehensive quality of power supply evaluation, this planing method is improved method according to state's net " 12 " planning directive/guide simultaneously, adds the concept of subregion in planning process in the past.Thus the planning needs that this planing method is more realistic.
Summary of the invention
It is single that the inventive method is intended to solve original appraisal procedure pattern in the new planning process of power distribution network, the problems such as planning efficiency is low.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of power distribution network assessment planing method, specifically comprise programme formation, comprehensive assessment and subregion statistics three large steps, finally complete whole assessment statistical method, wherein each step is as follows:
(1) programme is formed:
This function mainly carries out substation site selection to present situation electrical network, self routing between high pressure electrical network station, and the programme of low-voltage distribution network self routing is formulated, and programme is combined with map simultaneously and carries out visual deployment.Specifically comprise:
(1a) load prediction: native system mainly applies saturation load forecasting, saturation loading is the load scale of need for electricity saturation stage, is the new ideas proposed in Electric Power Network Planning.The research of existing saturation load forecasting mainly concentrates on the saturation load forecasting of City-level load, and the saturation load forecasting that the partition load that still lacks to power is object is applied.Apply this function and will carry out load prediction to subregion, and bear each power supply zone load prediction results.
(1b) Bus stop planning: Bus stop planning depends on load prediction, the block that planning unit is different from the past, but power supply zone is planned, based on load prediction results, to each power supply zone be analyzed to build the capacity of the quantity of transformer station and transformer station's inside main transformer, finally by substation planning on the map of reality.
(1c) high pressure distribution planning: high pressure distribution planning is then select different two electric pressures of high pressure distribution, and then by transformer stations all between analysis two electric pressures, program results is then the automatic layout of different substation being carried out circuit.This function will consider that the comprehensive practical factor such as existing circuit, N-1, line load rate carries out suitable circuit type selecting and deployment.
(1d) low-voltage distribution network planning: low-voltage distribution network planning then carries out automatic connecting to 10KV low-voltage distribution network circuit to distribution transforming, and the prerequisite of this functional realiey depends on the load data of distribution transforming.During planning, main line and distribution transforming are carried out automatic connecting.
(2) comprehensive assessment: multiple index to be assessed is mainly carried out comprehensively by comprehensive assessment function, after assessment, assessment result is carried out integrating and formed different year, different program results rack index contrast, to different single project evaluation than ever, this function has more comprehensive, intuitively can find out the quality of program results, and standby directive significance is had more to reality.Specifically comprise:
(2a) Reliability Evaluation: the basic thought of reliability assessment computing method is that research is to picture with load point, search for all to the influential equipment of this load point tool, and the impact after its fault of position analysis residing for faulty equipment, frequency of power cut and the power off time of load point caused.When analyzing each load point, the equipment calculated is only relevant to this load, and the fault analysis of unrelated equipment is all skipped over, and will greatly reduce the consumption of calculating like this.Searching method adopts the recursive algorithm of depth-first.
(2b) evaluation of power supply capability: this function will provide to be assessed its power supply capacity selected critic network model and load level, relate to the aspects such as Load flow calculation, main transformer capacity-load ratio, layout of roads load factor, low-voltage circuit radius of electricity supply, and provide the power supply capacity index summarized results of this electrical network.
(2c) power supply quality assessment: power supply quality assessment is mainly added up the theoretical pressure drop of circuit, thus counts the line theory pressure drop qualification rate after planning.
(2d) power supply economics assessment: power supply economics assessment is mainly added up network loss in electrical network after planning, and network loss is made up of transformer loss and line loss two parts.Result of calculation will list the meritorious computed losses of transformer active computed losses and circuit respectively.
(2e) short-circuit current assessment: short-circuit current assessment is a function of subregion internal short-circuit level being carried out to quantitative evaluation, and evaluation object is circuit and transformer, result will list respective short-circuit current and whether out-of-limit situation.
(2f) N-1 assessment: N-1 assessment will be done percent of pass to transformer and outlet in all transformer stations and detect, and then count opposite equip. further for the circuit passed through, transformer.
(3) subregion statistics:
Subregion statistical function, then in planning, carry out after comprehensive assessment function, follows the definition carrying out different subregion according to load type difference belonging to power supply area, and combines assessment to the subregion after definition and program results is added up, and finally bears subregion statistical report.
Unijunction fruit is divided into export and two Comparative result in report the test.Unijunction fruit export main with subregion be dividing unit to the comprehensive assessment result index in subregion by each classification indicators formatted output; Two Comparative result is then pressed two kinds of different results, and a point index is compared, and then deck watch is exported, and for clear result of checking comparison, thus more easily draws the good and bad degree of different program results.
This beneficial effect of the invention is: patent of the present invention is mainly used to solve in planning process with a point Division new paragon.And Comparative result can be pinpointed the problems place more intuitively after comprehensive assessment, thus better guiding plan result.
" formation of programme " function in this method, more quickly the large amount of complex data in a larger electrical network can be carried out the calculating of robotization, thus draw a planning cloth station, wiring result visualization result, solve the problem that artificial manually planning amount of calculation is large in the past preferably.
" comprehensive assessment " function in this method, " N-1 assessment " will find not possess the feeder line turning power supply capacity better and be shown, for adjusting new main transformer capacity or feeder line connected mode." evaluation of power supply capability ", " power supply quality assessment ", " Reliability Evaluation " whether, by qualified for the power supply capacity and quality better judging the rear new electrical network of planning, whether the electrical network cooked up is reliable." short-circuit current assessment " can solve the problem of circuit selection type number discontented sufficient actual requirement in planning process.Its comprehensive assessment is then summarized from comprehensive angle to program results, instructs preferably to planning.
Form with subregion is added up by " subregion statistics " function in this method, thus solves the subregion statistical requirements in new planning, different program results can be carried out thinner datumization comparison simultaneously, more convincing to the quality of result.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described, better to understand the present invention.
Embodiment
Power distribution network assessment planing method in the present embodiment, first data item used to this method in concrete implementation process prepares, then will start " comprehensive assessment planning ", the order called is " formation of programme "-> " comprehensive assessment "-> " subregion statistics "." formation of programme " data to input are added up, and carry out load prediction to partition data, and then to carry out Bus stop planning result be transformer station's distribution plan on subregion in each block.Again carry out high pressure distribution planning, by forming the self routing between high pressure Liang Ge electric pressure transformer station, finally carrying out low-voltage distribution network planning, by the automatic subordinate of the circuit of minimum voltage grade to distribution transforming, completing whole planning.The result data that " comprehensive assessment " will utilize after planning, then respectively from " N-1 assessment ", " evaluation of power supply capability ", " power supply quality assessment ", " Reliability Evaluation ", analysis and evaluation is carried out to data in aspects such as " short-circuit current assessments ", right assessment result done one and gathers, and carry out pointing out or providing suggestion for gathering information, form comprehensive assessment report." report the test output " compares assessment result, carries out statistical, finally export analysis report from the angle of data subitem to every good and bad degree.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (5)
1. a power distribution network assessment planing method, is characterized in that: specifically comprise programme formation, comprehensive assessment and subregion statistics three large steps, finally complete whole assessment statistical method, wherein each step is as follows:
(1) programme is formed: this function mainly carries out substation site selection to present situation electrical network, self routing between high pressure electrical network station, and the programme of low-voltage distribution network self routing is formulated, and programme is combined with map simultaneously and carries out visual deployment;
(2) comprehensive assessment: multiple index to be assessed is mainly carried out comprehensively by comprehensive assessment function, after assessment, assessment result is carried out integrating and formed different year, different program results rack index contrast, to different single project evaluation than ever, this function has more comprehensive, intuitively can find out the quality of program results;
(3) subregion statistics: subregion statistical function then carries out after planning, comprehensive assessment function, follow and carry out the definition of different subregion according to load type difference belonging to power supply area, and the subregion combination assessment after definition and program results are added up, finally bear subregion statistical report.
2. power distribution network assessment planing method according to claim 1, is characterized in that: described programme forms concrete function and comprises: (1a) load prediction; (1b) Bus stop planning; (1c) high pressure distribution planning; (1d) low-voltage distribution network planning.
3. power distribution network assessment planing method according to claim 1, is characterized in that: described comprehensive assessment concrete function comprises: (2a) Reliability Evaluation; (2b) evaluation of power supply capability; (2c) power supply quality assessment; (2d) power supply economics assessment; (2e) short-circuit current assessment; (2f) N-1 assessment.
4. power distribution network assessment planing method according to claim 1, is characterized in that: in described subregion statistics, is divided into unijunction fruit to export and two Comparative result in report the test; Unijunction fruit export main with subregion be dividing unit to the comprehensive assessment result index in subregion by each classification indicators formatted output; Two Comparative result is then pressed two kinds of different results, and a point index is compared, and then deck watch is exported, and for clear result of checking comparison, thus more easily draws the good and bad degree of different program results.
5. the power distribution network assessment planing method according to Claims 1-4, it is characterized in that: the concrete implementation process of described method is: data item first used to this method prepares, then will start " comprehensive assessment planning ", the order called is " formation of programme "-> " comprehensive assessment "-> " subregion statistics ";
Described " formation of programme " data to input are added up, and carry out load prediction to partition data, and then to carry out Bus stop planning result be transformer station's distribution plan on subregion in each block; Again carry out high pressure distribution planning, by forming the self routing between high pressure Liang Ge electric pressure transformer station, finally carrying out low-voltage distribution network planning, by the automatic subordinate of the circuit of minimum voltage grade to distribution transforming, completing whole planning;
The result data that described " comprehensive assessment " will utilize after planning, then respectively from " N-1 assessment ", " evaluation of power supply capability ", " power supply quality assessment ", " Reliability Evaluation ", analysis and evaluation is carried out to data in " short-circuit current assessment " aspect, right assessment result done one and gathers, and carry out pointing out or providing suggestion for gathering information, form comprehensive assessment report;
Described " report the test output " compares assessment result, carries out statistical, finally export analysis report from the angle of data subitem to every good and bad degree.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680340A (en) * | 2015-03-30 | 2015-06-03 | 国家电网公司 | Distribution network planning method and system |
| CN105303259A (en) * | 2015-11-06 | 2016-02-03 | 国网上海市电力公司 | Gridding concept based power distribution network planning management method |
| CN109818350A (en) * | 2019-03-26 | 2019-05-28 | 深圳市九众能源科技有限公司 | A kind of electric energy intelligent management and its management system |
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| CN101320449A (en) * | 2008-07-17 | 2008-12-10 | 上海电力学院 | Power distribution network estimation method based on combination appraisement method |
| CN103426120A (en) * | 2013-04-24 | 2013-12-04 | 华北电力大学 | Medium and low voltage power distribution network comprehensive evaluation method based on reliability |
| CN105095971A (en) * | 2014-05-07 | 2015-11-25 | 国网山东省电力公司泰安供电公司 | Comprehensive assessment planning method based on power distribution network subareas |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101320449A (en) * | 2008-07-17 | 2008-12-10 | 上海电力学院 | Power distribution network estimation method based on combination appraisement method |
| CN103426120A (en) * | 2013-04-24 | 2013-12-04 | 华北电力大学 | Medium and low voltage power distribution network comprehensive evaluation method based on reliability |
| CN105095971A (en) * | 2014-05-07 | 2015-11-25 | 国网山东省电力公司泰安供电公司 | Comprehensive assessment planning method based on power distribution network subareas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680340A (en) * | 2015-03-30 | 2015-06-03 | 国家电网公司 | Distribution network planning method and system |
| CN105303259A (en) * | 2015-11-06 | 2016-02-03 | 国网上海市电力公司 | Gridding concept based power distribution network planning management method |
| CN109818350A (en) * | 2019-03-26 | 2019-05-28 | 深圳市九众能源科技有限公司 | A kind of electric energy intelligent management and its management system |
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