CN102497135B - A kind of photovoltaic plant method for supervising of rule-based engine - Google Patents
A kind of photovoltaic plant method for supervising of rule-based engine Download PDFInfo
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Abstract
A kind of photovoltaic plant method for supervising of rule-based engine, establish a network configuration formed by rule condition, become the network of an effective filtering data, the fact enters into the true Parameter transfer of the root node of tree to rule, and along the structure going down set, if matched corresponding condition just to continue down to transmit until incoming terminal leafy node, filtered layer by layer by this, from root node more away from, the data of coupling are fewer, this makes it possible to filter out the fact meeting rule condition.The present invention solves the null link operational issue in former Rete network well, decreases the waste in space, can save space when processing mass data; Meanwhile, owing to adding true number quantitative statistics, order arrangement is carried out to the fact efficiency of mating is improved.When process photovoltaic plant detects data in a large number, improve the real-time of supervisory control system, portability and treatment effeciency.
Description
Technical field
The present invention relates to photovoltaic plant monitoring field, the especially efficient management of photovoltaic plant monitor message, specifically a kind of photovoltaic plant method for supervising of rule-based engine.
Background technology
At present, solar-electricity along with scale stands in China and starts build successively and put into operation, how understanding the operation conditions in power station in real time, how to meet the monitoring demand of upper level system or power network dispatching system, is power station owner and grid company institute questions of common interest.Existing photovoltaic power station monitoring system provides with equipment primarily of inverter manufacturer, main from our factory's inverter, some parameters that power station is run are monitored, cannot or hardly the running status of direct control inverter, also cannot obtain the information of the miscellaneous equipment in power station and control these equipment, more cannot meet the real-time monitoring requirement of power network dispatching system to power station.In addition, large-scale power station all can adopt the product of different vendor, and the product of these different vendors each other cannot be compatible, causes one by one " isolated island " system, cannot form unified monitoring system.
Under traditional development mode, photovoltaic plant staff has different actual demands for management distinct device, and this will inevitably bring the renewal of system and difficult in maintenance.On the one hand, user requires that the management of system can realize automation, and relevant business personnel can rule directly in management system, facilitates them to carry out rapidly increasing according to the change of market business rule, deletes and the operation such as amendment.On the other hand, project development personnel more attention is how program realizes.But, the business rule that some demand produces cannot be derived with intrinsic or specific algorithm, or be difficult to represent with conventional data model, in this case, after just there will be coding, miscellaneous service rule appears at everywhere among code pell-mell, and the updating maintenance cost of system is increased.
Regulation engine can address these problems well.The basic thought of regulation engine is disassociation service logic and business datum, extracts usually used as the service logic changing main body, as the part of an independent maintenance in the middle of the code of confusion.When service logic changes, rule changes thereupon, and other parts being included in the system in design and code then remain unchanged.
It is crucial that pattern matcher in the structure of regulation engine.Pattern matcher popular at present has based on Rete method, Leaps method, KMP method etc.Wherein Rete method is most widely used, but Rete method also exist internal memory use amount large, can not provide support for the expression formula of time-sensitive sexual norm, the number of null link too much time with regard to shortcomings such as inefficiencies.
Summary of the invention
The problem cannot unifying efficient management of the real time information provided for different hardware equipment in photovoltaic plant is provided, proposes a kind of photovoltaic plant method for supervising of rule-based engine.
Technical scheme of the present invention is:
A photovoltaic plant method for supervising for rule-based engine, is characterized in that it comprises the following steps:
(a), build initial monitor network and Rete network, create root node, Alpha node and Beta node, Alpha node and Beta node are initially sky node;
Root node is empty node, is the entrance that each data enter into monitor network;
Alpha node is for recording the relevant parameter i.e. tuple of true composition of each equipment in monitor network;
Beta node is used for record rule, and rule is the tuple that the setup parameter of being namely correlated with by the relevant criterion of a series of decision logic and photovoltaic industry is formed;
Whether the content of (b), inspection monitoring rules and Beta node exists, and if there is no, then sets up the Beta node of a correspondence; If existed, then continue step c;
The relevant parameter of each equipment in the monitor network related in (c), inspection rule, if there is no, then the Alpha node setting up multiple correspondence is respectively used to the relevant parameter depositing each equipment; If existed, then continue step c;
(d), meet the demand of respective rule when the combination of Alpha node, can with Beta node matching time, the match is successful, repeats step c, until all tuples in this rule have the combination of corresponding Alpha node can mate with it;
E (), repetition step b-d, until create all rules and Beta node, create Action node, be connected, as the output node of monitor network with all Beta nodes.
The relevant parameter of each equipment that Alpha node of the present invention records comprises the state relevant parameter of each inverter, the power supply status relevant parameter of each radiator panel, the state relevant parameter of blower fan, the state of tap changer motor, circuit breaker air pressure, the position of circuit breaker change over switch and the state relevant parameter of oil pump.
Each Alpha node of the present invention includes multiple fact, i.e. the voltage of monitored device, electric current or frequency, phase place, device temperature, pressure and gas density.
In step c of the present invention, if Alpha node exists, then record the position of this Alpha node, if do not exist, then create new Alpha node in a network, set up corresponding Alpha memory simultaneously, and counter be set in Alpha memory, in order to record in Alpha memory stored in true quantity.
In steps d of the present invention, after Alpha node is set up, each Alpha node is resequenced according to the true quantity of each Alpha memory Counter record is ascending, if in this time is filtered, the fact do not satisfied condition in certain Alpha memory, then temporarily extract this Alpha node, residue Alpha node is labeled as after sequence: Alpha (1'), Alpha (2') ..., Alpha (n').
Such as: a rule is the state judging radiator, inside Beta node be the tuple composition that [solar radiation angle, certain electric current, certain voltage, certain resistance] is formed.And these parameters are from different hardware devices, suppose there are 3, so just have three different Alpha nodes and Beta node corresponding.Wherein have and only have a node (being assumed to be Alpha1 node) to have two parameters, being assumed to be [solar radiation angle, certain electric current].When coupling, by the sequence to Alpha node, just first to the fact in Alpha1 node be mated, because comprised the under this rule true quantity of Alpha1 node is maximum.Once with Alpha1 node, it fails to match, just need not mate two other Alpha node again.
Beta node is created in steps d of the present invention, then relevant Alpha node and Beta node are coupled together, as input, if Beta node needed >=fact of 2 Alpha nodes, just first create the fact that a Beta1 node comprises the first two Alpha node, Alpha1 node and Alpha2 node are respectively as the left and right input of Beta1 node; Using the left input of Beta1 node as Beta2 node, using the right input of Alpha3 node as Beta2; Then using the left input of Beta2 node as Beta3 node, Alpha4 node as the right input of Beta3 node, by that analogy.
Beneficial effect of the present invention:
In the real-time monitoring of photovoltaic plant, because watch-dog quantity is many, detect data huge, to need from various data, through Treatment Analysis, to obtain useful conclusion.In supervisory control system, application rule engine can address this problem well.The key of regulation engine is matching technique.What apply in the present invention is a kind of Rete matching technique improved, establish a network configuration formed by rule condition, become the network of an effective filtering data, the fact enters into the true Parameter transfer of the root node of tree to rule, and along the structure going down set, if matched corresponding condition just to continue down to transmit until incoming terminal leafy node, filtered layer by layer by this, from root node more away from, the data of coupling are fewer, this makes it possible to filter out the fact meeting rule condition.
In conjunction with the actual conditions of photovoltaic plant information classification treatment system, the present invention improves in following two the matching way of Rete algorithm:
1. due in the matching process of Rete network, if any one in Alpha memory and Beta memory is empty, just there will be null link operation, if the matching result of sky is continued to propagate downwards along Rete network, then can cause more null link, along with the increase of null link number, the efficiency of matching algorithm will be affected.As a rule does not need the information about electric current, but the information of electric current but constitutes an empty Alpha node, and in Rete network, take part in the process of coupling, will produce a large amount of skies and connect, cause space waste.In the middle of photovoltaic plant specification processing system, the data volume of various information is larger, the flow process of carrying out statistical disposition is also more, comprising to various photovoltaic data genaration hour, my god, month, season, the data in year are produced, when enquiry of historical data or other operations, because the time span of data product is larger, be often false to the judgement of year node in the condition of rule, corresponding Alpha memory so will be made for empty, now just there will be null link, there are the operations such as the historical data fusion of the data product to year that a series of null link will be caused to operate if follow-up, thus the efficiency of impact coupling.
For this situation, when judging year node, if time span is inadequate, Alpha memory is empty, we just disconnect the link of corresponding AlphaNode and Beta memory, and like this when Beta memory is non-NULL, relevant link operation would not occur null link; When time span meets, such as annual January 1, Alpha memory was then non-NULL by idle running, and at this moment we just link this AlphaNode and Beta memory again, have carried out corresponding data processing to December 31.
2. in the process of coupling, putting in order of pattern in fact also has the impact of any on the efficiency of coupling, unreasonable if put in order, just likely make the true quantity that contains in corresponding Alpha memory and Beta memory very large, at this moment will consume a large amount of time and internal memory and carry out contained true link operation in two memories, thus reduce the efficiency of coupling.In the process that photovoltaic plant information data is processed, the data volume of information is larger, the Rule of judgment of rule is the comparison of logarithm value mostly, so the true quantity meeting certain rule condition may be larger, if by advanced for the Alpha memory containing these facts joining line operation, then there will be above-mentioned problem.
So, here, we consider by the fact stored in Alpha memory time, add true number quantitative statistics, if the rule constrain condition of pattern is more, then the true quantity meeting this pattern is fewer, also fewer stored in the true quantity in Alpha memory, so in follow-up link operation, just the Alpha memory containing true negligible amounts is preferentially carried out link operation.In the monitoring of actual light overhead utility, a such as rule is made up of certain electric current, certain voltage, certain solar radiation angle, but once electric current is more than 100A, other parameters are the operations what state all will carry out being correlated with, then in the matching process, should first mate with current value, to reach maximum matching efficiency.
Such as there is following rule:
(P rule 1
(context phase 1)…(a)
(large <x>)…(b)
(middle <x>)…(c)
(small <x>)…(d)
(make...))
According to containing true number adjust after, rule is changed into:
(P rule 1
(context phase 1)…(a)
(small <x>)…(d)
(middle <x>)…(c)
(large <x>)…(b)
(make...))
This conversion can carry out visual representation with Fig. 3.
The present invention refer to engine rule in the monitoring of photovoltaic plant, improved Rete matching technique is employed in pattern matching, solving the null link operational issue in former Rete network well, decrease the waste in space, can space be saved when processing mass data; Meanwhile, owing to adding true number quantitative statistics, order arrangement is carried out to the fact efficiency of mating is improved.When process photovoltaic plant detects data in a large number, improve the real-time of supervisory control system, portability and treatment effeciency.
Accompanying drawing explanation
Fig. 1 is Rete network matching structure schematic diagram.
Fig. 2 is an example of Rete matching network.
Fig. 3 is that mobile node differentiates process schematic.
In Fig. 3:
represent alpha to store
(large ...) the work storage collection of representative containing a great number of elements
(middle ...) the work storage collection of representative containing medium-scale element
(small ...) the work storage collection of representative containing oligo-element
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
In the real-time monitoring of photovoltaic plant, because watch-dog quantity is many, detect data huge, to need from various data, through Treatment Analysis, to obtain useful conclusion.In supervisory control system, application rule engine can address this problem well.The key of regulation engine is matching technique.What apply in the present invention is a kind of Rete matching technique improved.
In the present invention, establish a network configuration formed by rule condition, become the network of an effective filtering data, the fact enters into the true Parameter transfer of the root node of tree to rule, and along the structure going down set, just continues down to transmit until incoming terminal leafy node if matched corresponding condition, filtered layer by layer by this, from root node more away from, the data of coupling are fewer, this makes it possible to filter out the fact meeting rule condition.
4 kinds of base nodes are had: RootNode, 1-input (AlphaNode), 2-input (BetaNode) and Action node in the Rete photovoltaic plant monitor network structure of our structure.Wherein RootNode is a virtual nodes, and it is the entrance that all data objects enter Rete network; AlphaNode is in order to assess the constraints of the single fact; BetaNode is in order to assess the constraints of one group of fact, BetaNode has two inputs and multiple output, two inputs the LeftInput (left side input) and RightInput (the right input) that is otherwise known as, the combination of a LeftInput normally data object, RightInput is individual data object.Action node represents regular all conditions, and all the match is successful.
In the photovoltaic plant monitoring of reality, root node is an empty node, is the entrance that each data enter into network; Namely the fact is the tuple of the data composition that each inverter detects, comprises the data that voltage, electric current, frequency etc. monitor in tuple; Rule is the tuple be made up of with the relevant criterion of some photovoltaic industries a series of decision logic.Such as, if desired judge whether the radiator panel of photovoltaic plant normally works, possible demand judges that radiator panel is the need of emergency maintenance, at present can time of continuous firing whether more than 8 hours etc.Each demand correspond to a rule, is a Beta node in Rete network.Radiator panel 1 constitutes N number of Alpha node to facts such as respective power supply status, fan condition and the oil pump states of the equipment such as radiator panel N, contains some data (as electric current and voltage etc.) in each node.When the combination of these alpha nodes meets corresponding demand, can with Beta node matching time, the match is successful, exits Rete network.(separately add radiator panel as needed or judge that true standard changes) when demand changes time, service logic also needs to change, as long as this time, we added or the corresponding rule of amendment, and the code of monitoring program need not be revised in large area, be successfully separated service logic and business datum.
During concrete enforcement:
A photovoltaic plant method for supervising for rule-based engine, in matching module, used improved Rete technology, Rete network matching structure and object lesson refer to Fig. 1 and Fig. 2.When processing a large amount of photovoltaic plant monitor datas, according to the rule base made in advance (i.e. user's request), mate according to following steps:
1. create RootNode;
2. check Article 1 rule:
(1) first pattern of extracting rule condition, checks the parameter type in pattern, if the type node exists, then continues to check next type; If there is no, then new type node is added;
(2) judge whether the AlphaNode corresponding with pattern sets up, if set up, then record the position of this AlphaNode, if do not set up, then create new AlphaNode in a network, set up corresponding Alpha memory simultaneously, and counter be set in Alpha memory, in order to record in Alpha memory stored in true quantity;
(3) (2) are repeated, until all patterns in rule condition have corresponding AlphaNode;
(4) after AlphaNode sets up, AlphaNode is resequenced according to the true quantity of each Alpha memory Counter record is ascending, if in this time is filtered, the fact do not satisfied condition in certain Alpha memory, then temporarily extracted by this AlphaNode, residue AlphaNode is labeled as after sequence: (1'), Alpha (2') for Alpha,, Alpha (n');
(5) BetaNode, BetaNode is created by Beta (2):
The LeftInput of Beta (2) be Alpha (1'), RightInput be Alpha (2');
The LeftInput of Beta (i) is Beta (i-1), RightInput is Alpha (i'), wherein i>2;
(6) (5) are repeated, until create all BetaNode;
(7) be that the action part of rule creates Action node, and as the output node of Beta (n);
3. repeat 2, until process strictly all rules.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (5)
1. a photovoltaic plant method for supervising for rule-based engine, is characterized in that it comprises the following steps:
A, build initial monitor network and Rete network, create root node, Alpha node and Beta node, Alpha node and Beta node are initially sky node;
Root node is empty node, is the entrance that each data enter into monitor network;
Alpha node is for recording the relevant parameter i.e. tuple of true composition of each equipment in monitor network;
Beta node is used for record rule, and rule is the tuple that the setup parameter of being namely correlated with by the relevant criterion of a series of decision logic and photovoltaic industry is formed;
Wherein, the relevant parameter of each equipment that Alpha node records comprises the state relevant parameter of each inverter, the power supply status relevant parameter of each radiator panel, the state relevant parameter of blower fan, the state of tap changer motor, circuit breaker air pressure, the position of circuit breaker change over switch and the state relevant parameter of oil pump;
Whether the content of b, inspection monitoring rules and Beta node exists, and if there is no, then sets up the Beta node of a correspondence; If existed, then continue step c;
The relevant parameter of each equipment in the monitor network related in c, inspection rule, if there is no, then the Alpha node setting up multiple correspondence is respectively used to the relevant parameter depositing each equipment; If existed, then continue step c;
D, meet the demand of respective rule when the combination of Alpha node, can with Beta node matching time, the match is successful, repeats step c, until all tuples in this rule have the combination of corresponding Alpha node can mate with it;
E, repetition step b-d, until create all rules and Beta node, create Action node, be connected, as the output node of monitor network with all Beta nodes.
2. the photovoltaic plant method for supervising of rule-based engine according to claim 1, is characterized in that described each Alpha node includes multiple fact, i.e. the voltage of monitored device, electric current, frequency, phase place, device temperature, pressure and gas density.
3. the photovoltaic plant method for supervising of rule-based engine according to claim 1, it is characterized in that in described step c, if Alpha node exists, then record the position of this Alpha node, if do not exist, then create new Alpha node in a network, set up corresponding Alpha memory simultaneously, and in Alpha memory, counter is set, in order to record in Alpha memory stored in true quantity.
4. the photovoltaic plant method for supervising of rule-based engine according to claim 3, it is characterized in that in described steps d, after Alpha node is set up, each Alpha node is resequenced according to the true quantity of each Alpha memory Counter record is ascending, if in this coupling, the fact do not satisfied condition in certain Alpha memory, then this Alpha node is temporarily extracted, residue Alpha node is labeled as after sequence: Alpha (1 '), Alpha (2 '),, Alpha (n ').
5. the photovoltaic plant method for supervising of rule-based engine according to claim 1, it is characterized in that creating Beta node in described steps d, then relevant Alpha node and Beta node are coupled together, as input, if Beta node needed >=fact of 2 Alpha nodes, just first create the fact that a Beta1 node comprises the first two Alpha node, namely Alpha1 node and Alpha2 node are respectively as the left and right input of Beta1 node; Using the left input of Beta1 node as Beta2 node, using the right input of Alpha3 node as Beta2; Then using the left input of Beta2 node as Beta3 node, Alpha4 node, as the right input of Beta3 node, by that analogy, gets well all Beta nodes until create.
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| CN106127306A (en) * | 2016-06-17 | 2016-11-16 | 北京理工大学 | A kind of high sharing Rete network construction method |
| CN107247588B (en) * | 2017-05-26 | 2020-10-23 | 电子科技大学 | Rule engine optimization method based on constraint frequency |
| CN112433774A (en) * | 2019-08-07 | 2021-03-02 | 中移信息技术有限公司 | Service information matching method, device, equipment and storage medium |
| CN113282350B (en) * | 2021-05-26 | 2023-01-13 | 重庆零壹空间科技集团有限公司 | Telemetering data interpretation method and device, computer equipment and readable storage medium |
| CN114268540B (en) * | 2021-12-22 | 2024-03-01 | 杭州萤石软件有限公司 | Rule engine optimization method, device and equipment |
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| CN101136549A (en) * | 2007-10-12 | 2008-03-05 | 清华大学 | Power system separation decision space screening method |
| CN101674032A (en) * | 2009-10-19 | 2010-03-17 | 浙江大学 | Automatic tracking type photovoltaic power station monitoring system based on wireless network |
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| CN101136549A (en) * | 2007-10-12 | 2008-03-05 | 清华大学 | Power system separation decision space screening method |
| CN101674032A (en) * | 2009-10-19 | 2010-03-17 | 浙江大学 | Automatic tracking type photovoltaic power station monitoring system based on wireless network |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20191114 |