CN101707372B - Method for calculating and releasing rate of qualified power quality and voltage indexes - Google Patents
Method for calculating and releasing rate of qualified power quality and voltage indexes Download PDFInfo
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Abstract
The invention discloses a method for calculating and releasing the rate of qualified power quality ad voltage indexes, which comprises a step of calculating the rate of the qualified power quality ad voltage indexes and a step of releasing the rate of the qualified power quality ad voltage indexes. In the step of calculating the rate of the qualified power quality ad voltage indexes, read test voltage data is subjected to abnormal data processing, a root-mean-square value is used to represent the condition of power quality in the time interval to count the qualified and nonqualified indexes, and then the qualification rate at a station is calculated. In the step of releasing the rate of the qualified power quality ad voltage indexes, the data stored by the step of calculating the rate of the qualified power quality ad voltage indexes of the selected station is read and the qualification rates of all stations are calculated and then output. In the invention, the traditional monitoring device is used to monitor data, and the problem that the voltage qualification rate cannot be calculated directly as all traditional monitoring devices do not record overvoltage time directly is solved.
Description
Technical field
The present invention relates to the qualified rate of the quality of power supply, relate in particular to a kind of calculating and dissemination method for quality of power supply voltage indexes qualification rate.
Background technology
The quality of power supply (Power Quality) refers to quality supply from universal significance, comprises quality of voltage, current quality, power supply quality and power quality.It can be defined as: cause the deviation of voltage, electric current or the frequency of power consumption equipment fault or cisco unity malfunction, its content comprises frequency departure, voltage deviation, voltage fluctuation and flicker, three-phase imbalance, temporary transient or transient overvoltage, wave distortion (harmonic wave), voltage dip, interruption, rises and power supply continuity etc. temporarily.
The specific targets of the quality of power supply comprise:
1. mains frequency: the nominal frequency of China's electric power system is 50Hz, regulation among the GB/T15945-1995 " quality of power supply unified power system frequency permissible variation ": electric power system normal frequency deviation allowable value is ± 0.2Hz, when power system capacity hour, deviate can be loosened to ± 0.5Hz, does not have the boundary of illustrative system amount of capacity in the standard.Stipulate that in " whole nation for electricity consumption rule " " permissible variation of power supply administration's frequency of supply: net capacity 3,000,000 kilowatts and above person is ± 0.2HZ; Net capacity is person below 3,000,000 kilowatts, for ± 0.5HZ.In the actual motion, from the whole nation each large power system operation see all remain on be not more than ± the 0.1HZ scope in.
2. stipulate among voltage deviation: the GB12325-90 " quality of power supply one admissible deviation of supply volt-age ": the absolute value sum of 35kV and above supply power voltage positive and negative deviation is no more than 10% of rated voltage; The soil 7% that 10kV and following three phase supply voltage permissible variation are rated voltage; 220V single phase power supply voltage permissible variation is rated voltage+7%～10%.
3. stipulate among the imbalance of three-phase voltage GB/T15543-1995 " quality of power supply one three-phase voltage allows degree of unbalance ": electric power system points of common connection normal voltage degree of unbalance permissible value is 2%, must not surpass 4% in short-term.Standard stipulates that also the general limit value to each user's Voltage unbalance degree is 1.3%.
4. stipulate among the utility network harmonic wave GB/T14549--93 " quality of power supply-utility network harmonic wave ": the total percent harmonic distortion of 6～220kV utility grid voltage at different levels (phase voltage) is that 0.38kV is 5.0%, 6～10kV is 4.0%, 35～66kV is that 3.0%, 110kV is 2.0%; The allowable harmonic current that the user injects electrical network should guarantee that mains by harmonics voltages at different levels are in limits, so GB is stipulated the total percent harmonic distortion of voltage that mains by harmonics at different levels source produces and is: 0.38kV is 2.6%, 6～10kV is that 2.2%, 35～66kV is that 1.9%, 110kV is 1.5%.Power consumer to 220kV electrical network and power supply thereof is carried out with reference to this standard 110kV.
5. fluctuation and flickering GB12326--are as stipulating in " quality of power supply one admissible voltage fluctuation and flickering ": the voltage fluctuation permissible value of public supply terminals: 10kV and following 2.5%, the 35～110kV of being be 2%, 220kV and above be 1.6%.
And when the electrical network quality of power supply was assessed, in five top indexs, the voltage indexes qualification rate was one of important evaluation index, and common qualification rate algorithm is to be calculated by the qualification rate formula that GB is stipulated, formula is as follows:
Rate of qualified voltage %=(1-voltage overtime/total operating statistic time) * 100%
When calculating with this formula, voltage overtime, total these two parameters of operating statistic time need to be provided, but, used all kinds of monitoring devices in the monitoring system of building at present (such as Datanode5520 etc.) these two supplemental characteristics all can not directly be provided, when calculating, just run into certain trouble.
Summary of the invention
The object of the invention is to overcome the defective of prior art, and a kind of calculating and dissemination method for quality of power supply voltage indexes qualification rate is provided, utilize existing monitoring device Monitoring Data, solved the problem that in formula calculates, needs the timing statistics parameter.
The technical scheme that realizes above-mentioned purpose is: a kind of calculating and dissemination method for quality of power supply voltage indexes qualification rate, comprise quality of power supply voltage indexes qualification rate calculation procedure and quality of power supply voltage indexes qualification rate issuing steps, wherein,
Test voltage data after described quality of power supply voltage indexes qualification rate calculation procedure will read are carried out dealing of abnormal data, then represent quality of power supply situation in this time interval by root mean square value, carry out the statistics of the quantity of passing number and number of non-compliances, then after calculating a website qualification rate data of number of non-compliances, passing number, total number measured and qualification rate are stored, wherein, the formula of a website qualification rate of calculating is:
Website qualification rate=passing number/(passing number+number of non-compliances) * 100%;
Described quality of power supply voltage indexes qualification rate issuing steps reads the data of storing in the quality of power supply voltage indexes qualification rate calculation procedure of all websites, obtain all website passing numbers, all website numbers of non-compliances, export all website qualification rates after calculating all website qualification rates, the formula of these all website qualification rates is: all website qualification rates=all website passing numbers/(all website passing numbers+all website numbers of non-compliances) * 100%.
The above-mentioned calculating and the dissemination method that are used for quality of power supply voltage indexes qualification rate, wherein, described quality of power supply voltage indexes qualification rate issuing steps may further comprise the steps:
Step S11, beginning;
Step S12 reads basic parameter, test voltage data, namely reads basic parameter and electric energy quality test voltage data;
Step S13, dealing of abnormal data is processed the abnormal data in the test data that reads among the step S12, the rejecting abnormalities data;
Step S14 need to judge whether circulation read test data,
If need, then enter step S15;
If do not need, then directly enter step S18;
Whether step S15 judges test data/normal voltage less than or equal to international root,
If whether test data/normal voltage then enters step S16 less than or equal to international root;
Step S16 returns step S14 after passing number added 1;
Step S17 returns step S14 after number of non-compliances added 1;
Step S18 calculates a website qualification rate, and the formula that calculates a website qualification rate is:
Website qualification rate=passing number/(passing number+number of non-compliances) * 100%;
Step S19, storage data, storage passing number, number of non-compliances, total number measured and the qualification rate that calculates.
The above-mentioned calculating and the dissemination method that are used for quality of power supply voltage indexes qualification rate, wherein, described quality of power supply voltage indexes qualification rate issuing steps comprises:
Step S21, beginning;
Step S22 reads the passing number of storing in the quality of power supply voltage indexes qualification rate calculation procedure, the data of number of non-compliances;
Step S23 calculates all website qualification rates, and the formula of these all website qualification rates is:
All website qualification rates=all website passing numbers/(all website passing numbers+all website numbers of non-compliances) * 100%;
Step S24, all website qualification rates of calculating among the output step S23.
The above-mentioned calculating and the dissemination method that are used for quality of power supply voltage indexes qualification rate, wherein, in quality of power supply voltage indexes qualification rate calculation procedure, the time interval of calculating can be 1m or 3m or 5m or 10m or 2h.
The invention has the beneficial effects as follows: the invention solves now all monitoring devices direct recording voltage overtime, therefore the direct problem of calculating voltage qualification rate, adopt the method for calculating separately, storage intermediate object program, read when needed intermediate object program and add up demonstration, greatly shortened the time of query count, owing to having utilized the intermediate data of storage, when issue, utilize this intermediate data to recomputate qualification rate, so just can when issue, freely choose calculating and the statistics that website carries out qualification rate, reach comparatively fast preferably level.
Description of drawings
Fig. 1 is the flow chart of quality of power supply voltage indexes qualification rate calculation procedure of the present invention;
Fig. 2 is the flow chart of quality of power supply voltage indexes qualification rate issuing steps of the present invention;
Fig. 3 is network architecture diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
A kind of calculating and dissemination method for quality of power supply voltage indexes qualification rate comprise quality of power supply voltage indexes qualification rate calculation procedure and quality of power supply voltage indexes qualification rate issuing steps, wherein,
Test voltage data after quality of power supply voltage indexes qualification rate calculation procedure will read are carried out dealing of abnormal data, then represent quality of power supply situation in this time interval by root mean square value, carry out the statistics of the quantity of passing number and number of non-compliances, then after calculating a website qualification rate data of number of non-compliances, passing number, total number measured and qualification rate are stored, wherein, the formula of a website qualification rate of calculating is:
Website qualification rate=passing number/(passing number+number of non-compliances) * 100%;
Quality of power supply voltage indexes qualification rate issuing steps reads the data of storing in the quality of power supply voltage indexes qualification rate calculation procedure of all websites, obtain all website passing numbers, all website numbers of non-compliances, export all website qualification rates after calculating all website qualification rates, the formula of these all website qualification rates is:
All website qualification rates=all website passing numbers/(all website passing numbers+all website numbers of non-compliances) * 100%.
See also Fig. 1, the flow chart of quality of power supply voltage indexes qualification rate issuing steps may further comprise the steps:
Step S11, beginning;
Step S12 reads basic parameter, test voltage data, namely reads basic parameter and electric energy quality test voltage data;
Step S13, dealing of abnormal data is processed the abnormal data in the test data that reads among the step S12, the rejecting abnormalities data;
Step S14 need to judge whether circulation read test data,
If need, then enter step S15;
If do not need, then directly enter step S18;
Whether step S15 judges test data/normal voltage less than or equal to international root,
If whether test data/normal voltage then enters step S16 less than or equal to international root;
Step S16 returns step S14 after passing number added 1;
Step S17 returns step S14 after number of non-compliances added 1;
Step S18 calculates a website qualification rate, and the formula that calculates a website qualification rate is:
Website qualification rate=passing number/(passing number+number of non-compliances) * 100%;
Step S19, storage data, storage passing number, number of non-compliances, total number measured and the qualification rate that calculates.
See also Fig. 2, the flow chart of quality of power supply voltage indexes qualification rate issuing steps comprises:
Step S21, beginning;
Step S22 reads the passing number of storing in the quality of power supply voltage indexes qualification rate calculation procedure, the data of number of non-compliances;
Step S23 calculates all website qualification rates, and the formula of these all website qualification rates is:
All the website qualification rates=qualified sum of all websites/(all website passing numbers+all website numbers of non-compliances) * 100%;
Step S24, all website qualification rates of calculating among the output step S23.
The data of existing apparatus record are that this data root mean square value can represent the quality of power supply situation in this time interval every data of a regular time interval record.Therefore can adopt formula of the present invention to calculate qualification rate, the time interval of calculating by this example can be 1m, 3m, 5m, 10m, 2h.Blanking time is shorter, and then authenticity is higher.
In actual use, because the data amount of calculation is large, in time calculating needs the more stand-by period, therefore this method has adopted independent calculating, storage intermediate object program reads intermediate object program and adds up demonstration when needing, can greatly shorten the time of query count again.As shown in Figure 3, adopted specially a calculation server 1 to carry out the computing of intermediate data, preserved operation result, this calculation server 1 links to each other with database of National Center 3, and database of National Center 3 links to each other with Web publisher server 2.
When data were issued, native system had adopted a classification minute authority dynamically to issue in conjunction with rights management and administrative unit's ownership management, namely utilizes intermediate data to recomputate all website qualification rates when issue, rather than simply with the approximate arithmetic average of qualification rate.
By dissemination method of the present invention, when issue, just can accomplish freely to choose calculating and the statistics that website carries out qualification rate, reach comparatively fast preferably level.
Method of the present invention is equally applicable in the calculating of electric voltage frequency, total percent harmonic distortion, degree of unbalance, flickering.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not consist of limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (1)
1. calculating and a dissemination method that is used for quality of power supply voltage indexes qualification rate comprises quality of power supply voltage indexes qualification rate calculation procedure and quality of power supply voltage indexes qualification rate issuing steps, it is characterized in that,
Test voltage data after described quality of power supply voltage indexes qualification rate calculation procedure will read are carried out dealing of abnormal data, then represent quality of power supply situation in this time interval by root mean square value, carry out the statistics of the quantity of passing number and number of non-compliances, then after calculating a website qualification rate data of number of non-compliances, passing number, total number measured and qualification rate are stored, wherein, the formula of a website qualification rate of calculating is:
Website qualification rate=passing number/(passing number+number of non-compliances) * 100%;
Described quality of power supply voltage indexes qualification rate issuing steps reads the data of storing in the quality of power supply voltage indexes qualification rate calculation procedure of all websites, obtain all website passing numbers, all website numbers of non-compliances, export all website qualification rates after calculating all website qualification rates, the formula of these all website qualification rates is:
All website qualification rates=all website passing numbers/(all website passing numbers+all website numbers of non-compliances) * 100%,
Described quality of power supply voltage indexes qualification rate issuing steps comprises:
Step S21, beginning;
Step S22 reads the passing number of storing in the quality of power supply voltage indexes qualification rate calculation procedure, the data of number of non-compliances;
Step S23 calculates all website qualification rates, and the formula of these all website qualification rates is:
All website qualification rates=all website passing numbers/(all website passing numbers+all website numbers of non-compliances) * 100%;
Step S24, all website qualification rates of calculating among the output step S23.
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| CN102479282A (en) * | 2010-11-23 | 2012-05-30 | 上海市电力公司 | Calculation method for voltage deviation in steady-state indicator of power quality |
| CN103713176B (en) * | 2012-09-28 | 2017-02-01 | 国家电网公司 | voltage detection device and system |
| CN103499731B (en) * | 2013-08-27 | 2016-08-24 | 广东电网公司电力科学研究院 | A kind of comprehensive analysis method of supply voltage qualification rate |
| CN106570635B (en) * | 2016-11-04 | 2020-09-04 | 广东电网有限责任公司电力科学研究院 | Voltage qualification rate multidimensional analysis method |
| CN108931755A (en) * | 2018-06-11 | 2018-12-04 | 宁波三星智能电气有限公司 | A kind of electric energy meter power grid quality determining method |
| CN111600467B (en) * | 2020-03-21 | 2022-07-29 | 青岛鼎信通讯股份有限公司 | System operation method for improving stability of energy router |
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| CN101562339A (en) * | 2009-05-08 | 2009-10-21 | 东南大学 | Reliability index calculating method of power distribution system based on successful flow |
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| CN101562339A (en) * | 2009-05-08 | 2009-10-21 | 东南大学 | Reliability index calculating method of power distribution system based on successful flow |
Non-Patent Citations (1)
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| 朱建良等.DHJ-1型电压合格率监测器.《黑龙江电力技术》.1992,第14卷(第3期),169-170，175. * |
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