CN105958535B - Distributed generation resource cluster control system and its control method - Google Patents

Distributed generation resource cluster control system and its control method Download PDF

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Publication number
CN105958535B
CN105958535B CN201610392352.5A CN201610392352A CN105958535B CN 105958535 B CN105958535 B CN 105958535B CN 201610392352 A CN201610392352 A CN 201610392352A CN 105958535 B CN105958535 B CN 105958535B
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generation resource
distributed generation
cluster
control
distributed
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CN105958535A (en
Inventor
赵景涛
陈娜
李哲
李鹏
龚向阳
周金辉
王威
刘沛立
马国平
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State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
Nari Technology Co Ltd
Ningbo Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Nanjing NARI Group Corp
Original Assignee
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Electric Power Research Institute of State Grid Zhejiang Electric Power Co Ltd
Nari Technology Co Ltd
Ningbo Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Nanjing NARI Group Corp
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J13/0079
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses a kind of distributed generation resource cluster control system, including:One distributed generation resource cluster monitoring main website and multiple distributed generation resource clusters, each distributed generation resource cluster include:The distributed generation resource of one distributed generation resource cluster control device for accessing distributed generation resource cluster monitoring main website and multiple access distributed generation resource cluster control devices.The invention also discloses a kind of control methods of distributed generation resource cluster control system:Distributed generation resource cluster monitoring main website monitors operation of power networks state in real time, carry out region optimal load flow calculating, the active power controller definite value of each distributed generation resource group, Reactive Power Control definite value, power factor controlling definite value and voltage control definite value in the case of acquisition optimal load flow, and the control definite value of distributed generation resource cluster is handed down to distributed generation resource cluster control device, distributed generation resource control is carried out by distributed generation resource cluster control device.The present invention, which can reduce the grid-connected safety and stability on power grid of distributed generation resource, to be influenced.

Description

Distributed generation resource cluster control system and its control method
Technical field
The present invention relates to a kind of distributed generation resource cluster control systems, further relate to a kind of distributed generation resource cluster control system Control method, belong to Distributed Power Generation field.
Background technology
The application of the new cleaning fuels such as photovoltaic, wind turbine is to solve the important means of future source of energy crisis and environmental pollution. According to the national development object of planning, China's distributed generation resource installed capacity in 2015 can reach 74GW, account for same period whole nation total installed capacity 5.0%;The year two thousand twenty distributed generation resource installed capacity can reach 187GW, account for the 9.3% of same period whole nation total installed capacity.Thief zone point Cloth power grid proposes challenge to the safe and reliable operation of power grid, therefore, improves the new energy consumption ratio of power grid, reduces Safety and stability influence on power grid is one of important research content of distributed generation resource interconnection technology,
At present, it solves the grid-connected technical way of distributed generation resource and includes micro-capacitance sensor, virtual plant, clustered control etc.. Clustered control technology is initially applied to extensive marine wind electric field cluster cutting-in control, be not yet successfully extended to distributed photovoltaic, The polymorphic types distributed electrical source domain such as gas turbine.The clustered control of distributed generation resource is to distributed generation resource in region in form It is integrated, but is different from the diversity of virtual plant internal electric source, clustered control object is generally same kind or contributes special Property approximate unit, the association of each unit in cluster, different control targe on room and time is more focused on control strategy Adjust complementary, unit is overcome to control isolatism and blindness.Meanwhile the control of distributed generation resource regional cluster is emphasized to power supply body Coordination control, relatively low to energy storage dependence, system builds more more economical property.
Invention content
It is an object of the invention to overcome deficiency of the prior art, a kind of distributed generation resource cluster control system is provided, Reducing the grid-connected safety and stability on power grid of distributed generation resource influences.
In order to achieve the above objectives, the technical solution adopted in the present invention is:Distributed generation resource cluster control system, feature It is, including:One distributed generation resource cluster monitoring main website and multiple distributed generation resource clusters, each distributed generation resource cluster packet It includes:One distributed generation resource cluster control device for accessing distributed generation resource cluster monitoring main website and multiple access distributed generation resources The distributed generation resource of cluster control device;Distributed generation resource cluster monitoring main website monitors operation of power networks state in real time, carries out region Optimal load flow calculates, and obtains active power controller definite value, the Reactive Power Control of each distributed generation resource group in the case of optimal load flow Definite value, power factor controlling definite value and voltage control definite value, and the control definite value of distributed generation resource cluster is handed down to distribution Power supply cluster control device carries out distributed generation resource control by distributed generation resource cluster control device.
The distributed generation resource cluster can be divided into according to the power producing characteristics of distributed generation resource, control mode, grid-connected position:It connects Enter same busbar distributed generation resource cluster, dispersion access distributed generation resource cluster.
The present invention also provides a kind of control methods of distributed generation resource cluster control system, include the following steps:
Step 1:Distributed generation resource group divides:Consider that the spatially distributed concentration degree of distributed generation resource, multimachine go out in region Power similarity, multi-agent synergy degree of controllability will access same type distributed generation resource in same substation and be classified as same cluster;
Step 2:Determine distributed generation resource group control pattern:According to the controllable situation of distributed generation resource group's interior power, determine to divide Cloth power supply group is:Constant voltage control model determines power factor controlling pattern and determines three kinds of moulds of active and reactive power control model One kind in formula;
Step 3:Area distribution formula power supply cluster optimal load flow calculates:Distributed generation resource cluster monitoring main website will be in region Each distributed generation resource group is equivalent to a node, carries out optimal load flow calculating to power supply, the load in region, obtains in network The optimal active and reactive power constant values of each node;
Step 4:Clustered control instruction issues:For distributed generation resource group's sending reference using constant voltage control model Voltage value, upper voltage limit value and voltage lower limit value;For issuing ginseng using the distributed generation resource group for determining power factor controlling pattern Examine power factor, upper voltage limit value and voltage lower limit value;For using the distributed generation resource for determining active and reactive power control model Group issues active power output desired value, idle output desired value;
Step 5:Cluster distributed power supply control:Distributed generation resource group is received under distributed generation resource cluster monitoring main website The control instruction of hair and adjusting definite value using distributed generation resource in the quick control group of the strategy of the group control pattern, meet group Distributed generation resource cluster monitoring main website demand for control;
Step 6:Clustered control result is returned to school, and distributed generation resource cluster control device returns distributed generation resource control result Distributed generation resource cluster monitoring main website is given in school.
The specific method of determining distributed generation resource group control pattern is in step 2:
It accesses same busbar distributed generation resource cluster and arbitrary control model can be used;Dispersion access distributed generation resource cluster is only Suitable for determining active and reactive power control model.
The specific control method of the constant voltage control model is as follows:
Distributed generation resource cluster control device receives cluster busbar voltage and refers to definite value Un and error range △ Un, in real time Cluster busbar voltage is monitored, if busbar voltage is less than (Un- △ Un), reduces distributed electrical active power factor definite value, and issue To the distributed generation resource in distributed generation resource cluster, output reactive power in distributed generation resource cluster is promoted;If busbar voltage is high In (Un+ △ Un), then distributed electrical active power factor definite value, and the distributed electrical being handed down in distributed generation resource cluster are promoted Source reduces output reactive power in distributed generation resource cluster.
The specific control method for determining power factor controlling pattern is as follows:
Distributed generation resource cluster control device receives cluster bus power factor with reference to definite value, is accessed with reference to busbar negative Lotus power, active power, the reactive power power generating value of distributed generation resource, issue distributed electrical source power definite value in computing cluster, Ensure that bus power factor is issued in distributed generation resource cluster monitoring main website within power factor range.
The specific control method for determining active and reactive power control model is as follows:
Distributed generation resource cluster control device receives the distributed generation resource cluster that distributed generation resource cluster monitoring main website issues Output active power, reactive power definite value, distributed generation resource cluster control device is according to distributed electrical in distributed generation resource cluster The output situation in source adjusts the realtime power of each distributed generation resource in proportion, ensures that distributed generation resource cluster is contributed in distribution In the limits that power supply cluster monitoring main website issues.
Compared with prior art, the advantageous effect that is reached of the present invention is:Using three layers of control structure, pass through different time The optimal control of dimension realizes the grid-connected effective support to power grid of distributed generation resource, can promote distributed generation resource in power grid Grid-connected digestion capability, reducing the grid-connected safety and stability on power grid of distributed generation resource influences, and promotes distributed generation resource cluster monitoring master The ability of regulation and control stood to distributed generation resource;It is controlled using trunking mode, by multiple distributed generation resource node equivalents a bit, to simplify Network topology, the new energy access quantity of the cluster monitoring main website that is effectively promoted.
Description of the drawings
Fig. 1 is the structure diagram of distributed generation resource cluster control system provided by the invention.
Fig. 2 is the structure diagram of the same busbar distributed generation resource cluster of access via telephone line.
Fig. 3 is the structure diagram of dispersion access distributed generation resource cluster.
Fig. 4 is the flow chart of the control method of distributed generation resource cluster control system provided by the invention.
Fig. 5 is distributed generation resource clustered control strategy block diagram
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention Technical solution, and be not intended to limit the protection scope of the present invention and limit the scope of the invention.
As shown in Figure 1, distributed generation resource cluster control system, including:One distributed generation resource cluster monitoring main website and more A distributed generation resource cluster.Wherein, each distributed generation resource cluster includes:One is accessed distributed generation resource cluster monitoring main website The distributed generation resource of distributed generation resource cluster control device and multiple access distributed generation resource cluster control devices.Distributed generation resource Cluster control device disposes clustered control strategy, to realize that the coordination of more distributed generation resources in cluster controls, manages distributed electrical Source active power controller, Reactive Power Control realize that cluster is uniformly controlled target.Distributed generation resource should have receiving simultaneously in cluster Respond active power definite value, reactive power definite value, the ability of power factor definite value.
Distributed generation resource cluster can be divided into according to the power producing characteristics of distributed generation resource, control mode, grid-connected position:Access is same One busbar distributed generation resource cluster, dispersion access distributed generation resource cluster.
As shown in Fig. 2, be the structure diagram of the same busbar distributed generation resource cluster of access via telephone line, all distributed electricals Source is connect with same busbar, voltage of the output to distributed generation resource group's points of common connection of all distributed generation resources in group, Frequency has an impact.
As shown in figure 3, it is the structure diagram of dispersion access distributed generation resource cluster, in region distributed generation resource geography position Put it is close, contribute similar, but distributed generation resource accesses different busbares.
During work, distributed generation resource cluster monitoring main website monitors operation of power networks state in real time, in the time dimension of minute grade Region optimal load flow calculating is carried out, obtains the active power controller definite value, idle of each distributed generation resource group in the case of optimal load flow Power control definite value, power factor controlling definite value and voltage control definite value, and the control definite value of distributed generation resource cluster is issued Distributed generation resource cluster control device is given, distributed generation resource control is carried out by distributed generation resource cluster control device.
The invention also discloses a kind of control method of distributed generation resource cluster control system, which is based on upper The realization of distributed generation resource cluster control system is stated, is specifically comprised the following steps:
Step 1:Distributed generation resource group divides:Consider that the spatially distributed concentration degree of distributed generation resource, multimachine go out in region The factors such as power similarity, multi-agent synergy degree of controllability will access same type distributed generation resource in same substation and be classified as same cluster;
Step 2:Determine distributed generation resource group control pattern:According to the controllable situation of distributed generation resource group's interior power, determine to divide Cloth power supply group is:Constant voltage control model determines power factor controlling pattern and determines three kinds of moulds of active and reactive power control model One kind in formula:Arbitrary control model can be used for accessing same busbar distributed generation resource cluster;For dispersion access distribution Formula power supply cluster is only applicable to determine active and reactive power control model.
Step 3:Area distribution formula power supply cluster optimal load flow calculates:Distributed generation resource cluster monitoring main website will be in region Each distributed generation resource group is equivalent to a node, carries out optimal load flow calculating to power supply, the load in region, obtains in network The optimal active and reactive power constant values of each node.
Step 4:Clustered control instruction issues:
For using under distributed generation resource group's sending reference voltage value of constant voltage control model, upper voltage limit value and voltage Limit value.The specific control method of constant voltage control model is as follows:
Distributed generation resource cluster control device receives cluster busbar voltage and refers to definite value Un and error range △ Un, in real time Cluster busbar voltage is monitored, if busbar voltage is less than (Un- △ Un), reduces distributed electrical active power factor definite value, and issue To the distributed generation resource in distributed generation resource cluster, output reactive power in distributed generation resource cluster is promoted;If busbar voltage is high In (Un+ △ Un), then distributed electrical active power factor definite value, and the distributed electrical being handed down in distributed generation resource cluster are promoted Source reduces output reactive power in distributed generation resource cluster.
For using determine distributed generation resource group's sending reference power factor of power factor controlling pattern, upper voltage limit value and Voltage lower limit value.The specific control method for determining power factor controlling pattern is as follows:
Distributed generation resource cluster control device receives cluster bus power factor with reference to definite value, is accessed with reference to busbar negative Lotus power, active power, the reactive power power generating value of distributed generation resource, issue distributed electrical source power definite value in computing cluster, Ensure that bus power factor is issued in distributed generation resource cluster monitoring main website within power factor range.
For issuing active power output desired value, idle using the distributed generation resource group for determining active and reactive power control model Output desired value.The specific control method for determining active and reactive power control model is as follows:
Distributed generation resource cluster control device receives the distributed generation resource cluster that distributed generation resource cluster monitoring main website issues Output active power, reactive power definite value, distributed generation resource cluster control device is according to distributed electrical in distributed generation resource cluster The output situation in source adjusts the realtime power of each distributed generation resource in proportion, ensures that distributed generation resource cluster is contributed in distribution In the limits that power supply cluster monitoring main website issues.
Step 5:Cluster distributed power supply control:Distributed generation resource group is received under distributed generation resource cluster monitoring main website The control instruction of hair and adjusting definite value using distributed generation resource in the quick control group of the strategy of the group control pattern, meet group Distributed generation resource cluster monitoring main website demand for control;The input of clustered control module, output information are as shown in figure 5, clustered control Input data has:
Distributed electrical source packet includes distributed generation resource invertor operation parameter, operating status, distributed generation resource grid entry point The voltage of Bw, electric current, active and reactive, power factor, the voltage of the grid-connected PCC of cluster, active and reactive, power factor;
Sent instructions under main website including power factor argument sequence, voltage control parameter sequence, fixed active and reactive definite value is fixed It is worth tolerance, interconversion rate parameter.
Output information includes control daily record, and running log above send data etc..
Step 6:Clustered control result is returned to school, and distributed generation resource cluster control device returns distributed generation resource control result Distributed generation resource cluster monitoring main website is given in school.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and deformation can also be made, these are improved and deformation Also it should be regarded as protection scope of the present invention.

Claims (5)

1. the control method of distributed generation resource cluster control system, it is characterised in that:Include the following steps:
Step 1:Distributed generation resource group divides:Consider spatially distributed concentration degree, the multimachine output phase of distributed generation resource in region Like degree, multi-agent synergy degree of controllability, same type distributed generation resource in same substation will be accessed and be classified as same cluster;
Step 2:Determine distributed generation resource group control pattern:According to the controllable situation of distributed generation resource group's interior power, distribution is determined Power supply group is:Constant voltage control model is determined power factor controlling pattern and is determined in active and reactive power control model Three models One kind;
Step 3:Area distribution formula power supply cluster optimal load flow calculates:Distributed generation resource cluster monitoring main website will be each in region Distributed generation resource group is equivalent to a node, carries out optimal load flow calculating to power supply, the load in region, obtains each in network The optimal active and reactive power constant values of node;
Step 4:Clustered control instruction issues:For distributed generation resource group's sending reference voltage using constant voltage control model Value, upper voltage limit value and voltage lower limit value;For using the distributed generation resource group's sending reference work(for determining power factor controlling pattern Rate factor, upper voltage limit value and voltage lower limit value;For using under the distributed generation resource group for determining active and reactive power control model Send out active power output desired value, idle output desired value;
Step 5:Cluster distributed power supply control:Distributed generation resource group receives what distributed generation resource cluster monitoring main website issued Control instruction and adjusting definite value using distributed generation resource in the quick control group of the strategy of the group control pattern, meet group and are distributed Formula power supply cluster monitoring main website demand for control;
Step 6:Clustered control result is returned to school, distributed generation resource cluster control device by distributed generation resource control result return to school to Distributed generation resource cluster monitoring main website.
2. the control method of distributed generation resource cluster control system according to claim 1, it is characterised in that:In step 2 The specific method for determining distributed generation resource group control pattern is:
It accesses same busbar distributed generation resource cluster and arbitrary control model can be used;Dispersion access distributed generation resource cluster is only applicable in In determining active and reactive power control model.
3. the control method of distributed generation resource cluster control system according to claim 1, it is characterised in that:The fixed electricity The specific control method for pressing control model is as follows:
Distributed generation resource cluster control device receives cluster busbar voltage with reference to definite value Un and error range △ Un, monitors in real time Cluster busbar voltage, if busbar voltage is less than(Un-△Un), then distributed electrical active power factor definite value is reduced, and be handed down to point Distributed generation resource in cloth power supply cluster promotes output reactive power in distributed generation resource cluster;If busbar voltage is higher than(Un +△Un), then distributed electrical active power factor definite value, and the distributed generation resource being handed down in distributed generation resource cluster are promoted, is reduced Output reactive power in distributed generation resource cluster.
4. the control method of distributed generation resource cluster control system according to claim 1, it is characterised in that:It is described to determine work( The specific control method of rate factor control model is as follows:
Distributed generation resource cluster control device receives cluster bus power factor with reference to definite value, the load work(accessed with reference to busbar Rate, active power, the reactive power power generating value of distributed generation resource, issue distributed electrical source power definite value in computing cluster, ensure Bus power factor is issued in distributed generation resource cluster monitoring main website within power factor range.
5. the control method of distributed generation resource cluster control system according to claim 1, it is characterised in that:It is described to have surely Work(, the specific control method of Reactive Power Control pattern are as follows:
Distributed generation resource cluster control device receives the distributed generation resource cluster that distributed generation resource cluster monitoring main website issues and contributes Active power, reactive power definite value, distributed generation resource cluster control device is according to distributed generation resource in distributed generation resource cluster Output situation adjusts the realtime power of each distributed generation resource in proportion, ensures that distributed generation resource cluster is contributed in distributed generation resource In the limits that cluster monitoring main website issues.
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CN109638872B (en) * 2018-10-16 2020-08-04 北京金风科创风电设备有限公司 Method, device and system for controlling field control level power grid and storage medium thereof
CN109755971A (en) * 2019-03-21 2019-05-14 东南大学 A kind of active power distribution network voltage control method and system based on Virtual Cluster
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