CN104052159B - A kind of energy management controller for wind-light storage micro-grid system - Google Patents

A kind of energy management controller for wind-light storage micro-grid system Download PDF

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Publication number
CN104052159B
CN104052159B CN201410288149.4A CN201410288149A CN104052159B CN 104052159 B CN104052159 B CN 104052159B CN 201410288149 A CN201410288149 A CN 201410288149A CN 104052159 B CN104052159 B CN 104052159B
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China
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wind
power
grid
energy
light storage
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CN201410288149.4A
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CN104052159A (en
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刘征宇
田军
唐健
于海坤
舒军
吴建东
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中国东方电气集团有限公司
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    • Y02B90/222
    • Y02E10/563
    • Y02E10/566
    • Y02E10/763
    • Y02E10/766
    • Y02E40/72
    • 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
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin
    • Y02P80/22
    • Y02P80/25
    • 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
    • Y04S10/123Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • 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
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/12Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages

Abstract

The invention discloses a kind of energy management controller for wind-light storage micro-grid system, this energy management controller includes energy management monitoring system, generating and energy-storage system, plant area's load, distribution and protection system, data collecting system, remote scheduling and monitoring system, enable that buret manages system, Terminal Server Client and grid dispatching center obtain the wind-light storage equipment real time operation data in this micro-grid system in time, and system power parameter, the grid-connected output facilitating implementation whole micro-grid system is consumed by plant area's load, and accept the layering allotment of EMS and electrical network, reduce plant area's electric cost, meet being incorporated into the power networks steadily in the long term of wind-light storage micro-grid system simultaneously.

Description

A kind of energy management controller for wind-light storage micro-grid system

Technical field

The invention belongs to the technical field of power system distributed power generation micro-grid system, relate to a kind of for wind-light storage microgrid The energy management controller of system.

Background technology

In the past few decades, electrical network scale constantly expands, and the most progressively develops into the super large of centralized power generation, long distance power transmission Internet system.But the degree of dependence constantly increasing, making receiving end electrical network externally carry out electric power of long distance power transmission improves constantly, The stability of operation of power networks and safety tend to declining, and are difficult to meet variation power demands.On the other hand, normal to the whole world The worry of the problems such as rule the petering out of the energy, environmental pollution highlights the most day by day.In consideration of it, environmental protection, efficiently and be flexibly distributed Formula generating is extensively favored.

Distributed power generation generally refers to be distributed across smaller TRT (general below 50MW) user/negative Lotus scene or neighbouring place, thus realize the mode of generating energy supply.Distributed power generation has position feature flexible, scattered, pole Adapt to well dispersion electricity needs and resource distribution, delay the huge investment needed for transmission and distribution network upgrading;With big electricity Net is the most standby, also makes power supply reliability be improved;General the most also have pollute less, advantage that efficiency of energy utilization is high.

In recent years, the wind-light storage micro-grid system of employing includes at least one wind power generating set, at least one photovoltaic is sent out Group of motors, the energy storage device of at least one lithium battery, and the distribution system of correspondence.Wherein, wind power generating set, photovoltaic generation Unit, energy storage device are connected to ac bus by converter system, are connected with bulk power grid, meanwhile, bulk power grid are also associated with factory District's load.This system have employed a large amount of advanced quickly electric electronic current change technology, the various new energy and diversified storage Energy devices etc., having high efficiency of energy utilizes, increases economic efficiency, improves the advantages such as environmental benefit, but also brings many and electric The diverse feature of Force system, as distributed generation unit is of a great variety, response is fast, and overload capacity is poor, controls difficulty;Trend Two-way flow, original protective relaying device must update;Energy characteristics differs, and economic optimization is complicated;Therefore, microgrid is stable Optimize run depend not only upon advanced person cell level distributed generation unit control, also rely on the efficient system integration control and Energy management technology.

Summary of the invention

The purpose of the present invention is to propose to the energy management controller of a kind of wind-light storage micro-grid system being applicable to integrated mill, Enable that the wind-light storage equipment that buret reason system, Terminal Server Client and grid dispatching center obtain in this micro-grid system in time Real time operation data and system power parameter, it is simple to the grid-connected output realizing whole micro-grid system is disappeared by plant area's load Consumption, and accept the layering allotment of EMS and electrical network, reduces plant area electric cost, meets wind-light storage microgrid system simultaneously Being incorporated into the power networks steadily in the long term of system.

To this end, the present invention is by the following technical solutions:

A kind of energy management controller for wind-light storage micro-grid system, it is characterised in that: include that energy management monitoring is System, generating and energy-storage system, plant area's load, distribution and protection system, data collecting system, remote scheduling and monitoring system, its In, energy management monitoring system is by the network switch and generating and energy-storage system, distribution and protection system, data collecting system Set up communication to connect, energy management monitoring system by remote scheduling and monitoring system to generating and energy-storage system, plant area's load, Distribution and protection system, data collecting system carry out remote scheduling and monitoring;

Described energy management monitoring system is according to the main switch of current wind-light storage micro-grid system such as: high voltage bus switch, Cutting and state and merit of wind power generation set grid-connection switch, the grid-connected switch of photovoltaic generation unit and the grid-connected switch of energy storage device Rate controls the difference of enabler flags position, performs corresponding main control flow process or troubleshooting process, determines wind-light storage microgrid system Under the interior each power supply of system and load difference operating mode, all can reach the effective control to microgrid internal power, it is ensured that power flow direction meets to be wanted Ask;

Normally working to not affect on-site important load, different according to plant area's operating mode, reality is plant area's load power Pload, when energy management monitoring system detects that electrical network input active-power P 1, less than when setting threshold value, reduces wind-force immediately and sends out Exerting oneself, wherein of group of motors and photovoltaic generation unit: when wind power generating set and photovoltaic generation unit exert oneself be reduced to 0 time, Electrical network input active-power P 1 is still less than excision wind-light storage micro-grid system when setting threshold value.

In addition to wind power generating set, photovoltaic generation unit, energy storage device, described energy management controller passes through electric power relay protection Device detects plant area's electrical network inlet wire point, wind-light storage micro-grid system access point, the electric energy of wind-light storage micro-grid system low-voltage bus bar, electricity Pressure, electric current, frequency, meritorious, idle, power factor etc., wind power generating set to be detected, photovoltaic generation unit, energy storage device Generated energy, and the signal detected is inputted energy management monitoring system by Ethernet mode, by cutting-in control logic Open wind-light storage each unit, stop, power controls;It addition, be provided with reverse-power protection device at plant area's electrical network inlet wire point, prevent The electric energy backflow phenomena caused more than plant area's load because of wind-light storage experimental system generated energy.

Described generating and energy-storage system include at least one wind power generating set, at least one photovoltaic generation unit, extremely The energy storage device of a few lithium battery;Wind power generating set, photovoltaic generation unit, energy storage device are all connected to by converter system Ac bus, then be connected with bulk power grid, bulk power grid connects plant area's load;

Described plant area load includes that Factory Building produces load and living area load;

Described distribution and protection system are used for protecting power flow direction and the grid-connected switch of wind-light storage micro-grid system so that generating with The active power that energy-storage system sends only flows into the load on ac bus, and protects when there is inverse probability situation, tripping wind Light storage micro-grid system electrical network connecting valve, to prevent wind-light storage micro-grid system from falling power transmission to electrical network;

Described data collecting system is used for gathering analogue signal and digital signal, and wherein analogue signal includes generating and energy storage The signal of telecommunication of each generating equipment of system, the signal of telecommunication of plant area's load each point, digital signal is each in coming from wind-light storage micro-grid system The on off operating mode of chopper or the operating state of protection device;

Described remote scheduling and monitoring system are to utilize remote pages to set up remote scheduling and monitor workstation realization.

According to the described energy management controller for wind-light storage micro-grid system, it is characterised in that control principle is as follows:

1) generated output of wind-light storage system is less than plant area's load power, with electrical network input active-power P 1 for reference to letter Number, dynamically adjust the generated output P3 of wind-light storage system according to load power Pload, meet electrical network input active-power P 1 and be more than Set the requirement of threshold value;

2) photovoltaic generation runs according to MPPT;

3) higher limit of wind-power electricity generation peak power is that Pwind-max is sent out by the generated output P3 of wind-light storage system, photovoltaic Electrical power, energy storage charge-discharge electric power etc. calculate and obtain, as Wind turbines generated output Pwind < Pwind-max, and Wind turbines Running according to MPPT, as Wind turbines generated output Pwind >=Pwind-max, Wind turbines is according to Pwind-max invariable power Run;

4) energy storage device stabilizes scene output pulsation and the recovery of peak load shifting algorithm and supply load according to stabilizing algorithm Need.

According to the described energy management controller for wind-light storage micro-grid system, it is characterised in that this system controls wind-light storage The cutting-in control flow process of micro-grid system is as follows:

A) emergency shutdown, off-grid are shut down, and control room is powered by UPS;After safe shutdown, Guan Bi wind-light storage micro-grid system successively Accessing switch, 10Kv/690V low-pressure side bus switch, system re-powers, and central controller initializes, it may be judged whether to manually Operation;

B) plant area's whether No starting wind-light storage system is judged;

C) under the pattern of being incorporated into the power networks, electrical network point active power of output P1 is detected;Determine whether the working time, work as work During the time, it is judged that the meritorious P1 of electrical network input, whether more than setting threshold value, meets condition, and energy storage device is put down according to setting selection gist Press down algorithm and stabilize scene output pulsation or the recovery of peak load shifting algorithm and supply load needs;

D) time between operationally, it is judged that whether the meritorious P1 of electrical network input is more than setting threshold value;

E) P1 is more than setting threshold value, and the charged initialization of wind-light storage each unit controller sets Wind turbines maximum work output The rate upper limit is that Pwind-max is obtained by calculating such as the generated output P3 of wind-light storage system, photovoltaic generation power, energy storage charge-discharge electric power ?;

F) monitoring system transmits Pwind-max instruction to Wind turbines controller, it is judged that whether Wind turbines receives Pwind-max;

G) Wind turbines receives Pwind-max, enters control system of wind turbines, waits Wind turbines grid-connected conditions, full Foot condition, Guan Bi Wind turbines switch;Meanwhile, photovoltaic operates in normal operation state, waits grid-connected condition, meets bar Part, Guan Bi photovoltaic switch;

H) when wind-power electricity generation, photovoltaic power generation grid-connecting run, energy storage device is set and operates in grid-connected mode of operation, wait storage Energy grid-connected conditions, Guan Bi energy storage device switch;

I) wind-light storage is incorporated into the power networks, and detects electrical network point active power of output P1, the generated output P3 of wind-light storage system;

J) determine whether the working time, the most operationally between time, Wind turbines, photovoltaic safe shutdown, disconnect wind turbine Group switch, photovoltaic switch;

K) time between operationally, it is judged that the generated output of wind-light storage system whether less than plant area's load power, i.e. P3 < P1, meets requirement, it is judged that the meritorious P1 >=setting threshold value of electrical network input;Energy storage device is stabilized algorithm according to setting selection gist and is stabilized Scene output pulsation or peak load shifting algorithm reclaim and supply load needs;

L) when P1 >=setting threshold value, Pwind-max is set;

M) when P1≤setting threshold value, set Pwind-max and judge whether Pwind-max value of calculation is less than or equal to 0, completely Foot condition, sets aerogenerator unit safe and shuts down;

N) after aerogenerator unit safe is shut down, when again judging P1≤setting threshold value, photovoltaic and energy storage device safe stopping Machine.

The dispatch command of described energy management monitoring system delivers to the generating equipment of generating and energy-storage system, and timing simultaneously is read Take the operational factor of generating and the generating equipment of energy-storage system, such as: active power, reactive power, output frequency, fault in real time The operational factors such as state.Energy management monitoring system will be according to wind-light storage micro-grid system load condition and current each generating equipment Coordinate scheduling controlling.

Described generating with the generating equipment access way of energy-storage system is: wind-driven generator passes through step-down transformer and low pressure Bus connects, and photovoltaic generation group is connected to low-voltage bus bar.

Described distribution and protection system:

1 power controls

Normally working to not affect on-site important load, different according to plant area's operating mode, reality is plant area's load power Pload, when energy management monitoring system detects that electrical network input active-power P 1, less than when setting threshold value, reduces wind-force immediately and sends out Exerting oneself, wherein of group of motors and photovoltaic generation unit: when wind power generating set and photovoltaic generation unit exert oneself be reduced to 0 time, Electrical network input active-power P 1 is still less than excision wind-light storage micro-grid system when setting threshold value.To ensure normal power flow direction.

2 reverse-power protection measures

At the power relay of wind-light storage micro-grid system lead-in circuit breaker side installing band directivity, power relay is used for sentencing Disconnected power direction, the electric current of power relay comes from the electric current at wind-light storage micro-grid system switch cubicle lead-in circuit breaker, power The voltage of relay comes from the primary voltage at the lead-in circuit breaker of generating and energy-storage system;When wind-light storage micro-grid system occurs Fall to electrical network the inverse probability situation of power transmission time, reverse-power protection action, disconnect generating and energy-storage system.

Described data collecting system includes digital analog I O harvester, relay equipment and electric energy meter, protection observing and controlling dress Put and automatic weather station, wherein:

Analogue signal IO acquisition function is mainly realized by PLC, and the main analogue signal gathered comes from wind, light, Chu Gefa The power transducer of each point at electricity equipment and plant area's load, transformator both sides voltage, current transformer, with dry-type transformer temperature The signal of telecommunication that control case is passed back;Primary digital signal is each chopper on off operating mode or protection device operating state in coming from system, PLC drives digital output port to realize the telemechanical operation of the chopper of bus in system simultaneously;

Relay equipment and electric energy meter, protection supervisory equipment for the timing transmission each node power of wind-light storage micro-grid system, The distribution system parameters such as voltage, electric current, electric energy, fault, as energy management monitoring system to wind-light storage micro-grid system monitoring with The foundation controlled;

Automatic weather station is used for gathering real time meteorological data, such as: wind speed, wind direction, temperature, humidity, radiation;To generated output Prediction provides data support;Meanwhile, in the case of bad weather condition occurs, as energy management monitoring system starting protection merit The foundation of energy.

Electrical network remote scheduling power distribution automation solution is, is become with ownership by energy management computer by optical-fibre communications Power station is set up communication and is connected, it is achieved whole wind-light storage micro-grid system is scheduling controlling by ownership transformer station by the present invention.

Beneficial effects of the present invention is as follows:

The present invention sets up actual wind-light storage micro-grid system, EMS in somewhere, is obtained by data acquisition Generate electricity and energy-storage system in system, plant area's load, the real time execution parameter of distribution and protection system etc. and state, and according to operation State, completes the power control of wind generator system, photovoltaic generating system, energy-storage system, it is ensured that power is that electrical network flows to electricity consumption Load, and ensure frequency, the stablizing of active power.Wind-light storage each unit can be run by safety grid-connection, when plant area's load variations, Wind-light storage each unit is opened, stops by EMS, power controls, wind-light storage each unit can safe and stable operation, only To plant area, load is powered, not to bulk power grid power transmission.Receive electrical network remote scheduling simultaneously, and can be remotely accessed by Internet Issue the page.

Accompanying drawing explanation

Fig. 1 is wind-light storage micro-grid system structure chart

Fig. 2 is the reverse-power protection trend schematic diagram of the present invention

Fig. 3 is the system group network structural representation of the present invention

Detailed description of the invention

Wind-light storage micro-grid system is substantially by energy management monitoring system, generating and energy-storage system, plant area's load, distribution and guarantor Protecting system, data collecting system, system group network etc. six part composition.And sent out by the network switch by energy management monitoring system Electricity system, energy-storage system, distribution and protection system, data collecting system and remote scheduling and monitoring system set up communication even Connect.Energy management monitoring system is the control core of whole wind-light storage micro-grid system, mainly includes fault in terms of functional design Testing process, main control flow process and troubleshooting process.Cut also state and power according to current main switch control to enable The difference of flag bit, monitoring software is in different states.The different conditions of corresponding monitoring software, performs corresponding main control stream Journey or troubleshooting process, in determining microgrid under each power supply and load difference operating mode, all can reach to have microgrid internal power Effect controls, it is ensured that power flow direction meets requirement.EMS (building on database server), remote scheduling and monitoring System, remote server are all connected with switch, it is achieved with the purpose of micro-grid system Communication Control.Remotely monitor workstation can lead to Cross Internet and access remote server, and then access database server, it is achieved the operation feelings of monitoring wind-light storage experimental system The purpose of condition.

As it is shown in figure 1, wind-light storage micro-grid system includes at least one wind power generating set, at least one photovoltaic generation Unit, the energy storage device of at least one lithium battery, be connected with energy management monitoring system by switch.Energy management monitoring is The dispatch command of system delivers to each generating equipment, and timing simultaneously reads each generating equipment such as: in real time active power, reactive power, The operational factor such as output frequency, malfunction.Energy management monitoring system will according to wind-light storage micro-grid system load condition and Current each generating equipment coordinates scheduling controlling.

Generating equipment access way is: wind-driven generator is connected with low-voltage bus bar by step-down transformer.Photovoltaic generation group It is connected to low-voltage bus bar.

The power-supply system of wind-light storage micro-grid system, is attracted by local power network line.Plant area's load mainly includes complex factories Produce load and living area load.

Being incorporated into the power networks is the conventional operation mode of this pilot system.Blower fan, photovoltaic generation group and energy-storage system of accumulator are also Enter plant area's electrical network.Blower fan and photovoltaic generation group are powered to on-site load, owing to its generated energy is very big by such environmental effects, by Energy-storage system of accumulator stabilizes intrasystem meritorious fluctuation, and system respectively switchs by energy management monitoring system according to grid-connected work shape State is controlled.

1) power flow direction

From power balance result, daytime, night and nonworkdays daytime, wind-powered electricity generation and the generated energy of photoelectricity on weekdays Less than the burden requirement of full factory.At nonworkdays night, limiting system inner blower peak power, blower fan is exerted oneself and can not be more than load Aggregate demand.Therefore can accomplish in pilot system that renewable energy power generation amount is intended for plant area's load and uses by oneself, will not send outside to electrical network Electric power.Specifically on direction of tide, gaining merit that i.e. blower fan and photovoltaic send only can flow into the load on bus, without passing through Bus flows into power system.

2) power controls

Normally working to not affect on-site important load, different according to plant area's operating mode, reality is plant area's load power Pload, when energy management monitoring system detects that electrical network input active-power P 1, less than when setting threshold value, reduces wind-force immediately and sends out Exerting oneself, wherein of group of motors and photovoltaic generation unit: when wind power generating set and photovoltaic generation unit exert oneself be reduced to 0 time, Electrical network input active-power P 1 is still less than excision wind-light storage micro-grid system when setting threshold value.To ensure normal power flow direction.

3) inverse probability

As in figure 2 it is shown, the electrical main connecting wire of whole system is simplified as: bus to be regarded as a voltage node 1, Wind-light storage electricity generation system high-pressure side regards a voltage node 2 as, and the load on whole 1 bus is equivalent to a branch road, and load saves Point is 3, then whole system can abbreviation be a two ends power supply supply network.

When there is inverse probability phenomenon, intrasystem trend flow direction such as accompanying drawing 2(is left) shown in.Now wind-light storage generating System delivered power to grid side.Therefore, the trend flow direction allowed in system when being incorporated into the power networks can only be such as Fig. 2 (right) institute Show, it may be assumed that load branch circuit obtains meritorious and idle from two voltage nodes.Due to an only load branch circuit in this equivalent system, Not having other branch, therefore, load bus 3 is exactly the power branch in network, is also the voltage minimum point in network;Fig. 2 In, CB1 be electrical network service entrance switch, CB2 be the grid-connected switch of wind-light storage, P1+ Q1 be electrical network electrical network input general power (active power + reactive power), the generating general power (active power+reactive power) of P2+Q2 wind-light storage system.

Knowable to above tidal current analysis, as long as ensureing that the voltage (i.e. busbar voltage) of load bus 3 is less than 1,2 two voltages The voltage of node, would not occur that electric power is sent outside.And the voltage of voltage node 1 belongs to the scope of dispatching of power netwoks, uncontrollable, load The voltage of node 3 also can change according to the fluctuation of network load etc., unadjustable, therefore can only be by controlling voltage node 2 Voltage, i.e. by control wind-light storage low-pressure side bus voltage, prevent inverse probability phenomenon.

4) reverse-power protection measure

In order to monitor in network whether there occurs inverse probability in real time, can continue at the power of lead-in circuit breaker installing band directivity Electrical equipment judges power direction.When inverse probability situation occurs, reverse-power protection action tripping, disconnect wind-light storage system.Knot Close practical situation, the protection of low forward power can be used further to obtain bigger protection domain.

Wind-light storage micro-grid system key data collecting device has: digital analog I O harvester, relay equipment and electric energy Table, protection supervisory equipment and automatic weather station

Simulation IO acquisition function is mainly realized by PLC, and the main analogue signal that gathers comes from wind, light, each generating equipment of storage And the power transducer of each point at plant area's load, transformator both sides voltage, current transformer, pass with dry Transformer Temperature Controller case The signal of telecommunication returned;Primary digital signal is each chopper on off operating mode or protection device operating state, PLC simultaneously in coming from system Digital output port is driven to realize the telemechanical operation of the chopper of bus in system.

Relay equipment and electric energy meter, protection supervisory equipment major function are each node powers of timing transmission system, voltage, Electric current, electric energy, the distribution system health parameters such as fault, as EMS to system monitoring with control foundation.

Automatic weather station major function is: gather real time meteorological data such as: wind speed, wind direction, temperature, humidity, radiation;To wind Power generating and photovoltaic power generation power prediction provide data support;Simultaneously in the case of bad weather condition occurs, as energy The foundation of management system start-up defencive function.

Electrical network remote scheduling power distribution automation solution is, is become with ownership by energy management computer by optical-fibre communications Power station is set up communication and is connected, it is achieved whole wind-light storage micro-grid system is scheduling controlling by ownership transformer station by the present invention.

EMS is by the wind generator system in wind-light storage micro-grid system, photovoltaic generating system, energy-storage battery system The corresponding remote pages of running status selection of system and distribution and protection is remotely issued long-range monitor workstation and can be passed through Internet accesses remote server, and then accesses database server, it is achieved the ruuning situation of monitoring wind-light storage micro-grid system Purpose.

Present system for realizing equipment centralized Control in system, the most corresponding electrical network remote scheduling, and possessing Internet remote access function.

Claims (8)

1. the energy management controller for wind-light storage micro-grid system, it is characterised in that: include energy management monitoring system, Generating and energy-storage system, plant area's load, distribution and protection system, data collecting system, remote scheduling and monitoring system, wherein, Energy management monitoring system is built with energy-storage system, distribution and protection system, data collecting system by the network switch and generating Vertical communication connects, energy management monitoring system by remote scheduling and monitoring system to generate electricity with energy-storage system, plant area's load, join Electricity and protection system, data collecting system carry out remote scheduling and monitoring;
Described energy management monitoring system controls enabler flags according to cut also state and the power of current wind-light storage micro-grid system The difference of position, performs corresponding main control flow process or troubleshooting process, each power supply and negative in determining wind-light storage micro-grid system Under lotus difference operating mode, all can reach the effective control to microgrid internal power, it is ensured that power flow direction meets requirement;
Described energy management controller detects plant area's electrical network inlet wire point by electric power relay equipment, wind-light storage micro-grid system accesses Point, the electric energy of wind-light storage micro-grid system low-voltage bus bar, voltage, electric current, frequency, meritorious, idle, power factor a series of signal, Wind power generating set to be detected, photovoltaic generation unit, the generated energy signal of energy storage device, and by the signal that detects by with Too net mode input energy management monitoring system, is opened wind-light storage each unit by cutting-in control logic, stops, power control System;
Meanwhile, at plant area's electrical network inlet wire point, reverse-power protection device is installed;
Described generating and energy-storage system include at least one wind power generating set, at least one photovoltaic generation unit, at least one The energy storage device of platform lithium battery;Wind power generating set, photovoltaic generation unit, energy storage device are all connected to exchange by converter system Bus, then be connected with bulk power grid, bulk power grid connects plant area's load;
Described plant area load includes that Factory Building produces load and living area load;
Described distribution and protection system are used for protecting power flow direction and the grid-connected switch of wind-light storage micro-grid system so that generating and energy storage The active power that system sends only flows into the load on ac bus, and protects when there is inverse probability situation, tripping wind-light storage Micro-grid system electrical network connecting valve, to prevent wind-light storage micro-grid system from falling power transmission to electrical network;
Described data collecting system is used for gathering analogue signal and digital signal, and wherein analogue signal includes generating and energy-storage system The signal of telecommunication of each generating equipment, the signal of telecommunication of plant area's load each point, digital signal is each open circuit in coming from wind-light storage micro-grid system The on off operating mode of device or the operating state of protection device;
Described remote scheduling and monitoring system are to utilize remote pages to set up remote scheduling and monitor workstation realization;
Different according to plant area's operating mode, reality is plant area's load power Pload, when energy management monitoring system detects that electrical network inputs Active-power P 1 less than when setting threshold value, reduces exerting oneself, wherein of wind power generating set and photovoltaic generation unit: work as wind-force immediately When the exerting oneself of generating set and photovoltaic generation unit is reduced to 0, electrical network input active-power P 1 is cut still less than when setting threshold value Except wind-light storage micro-grid system.
A kind of energy management controller for wind-light storage micro-grid system the most according to claim 1, it is characterised in that: institute The dispatch command stating energy management monitoring system delivers to the generating equipment of generating and energy-storage system, and generating and storage are read in timing simultaneously The operational factor of the generating equipment of energy system;Energy management monitoring system will according to wind-light storage micro-grid system load condition and work as Front each generating equipment coordinates scheduling controlling.
A kind of energy management controller for wind-light storage micro-grid system the most according to claim 1, it is characterised in that: institute Stating generating with the generating equipment access way of energy-storage system is: wind-driven generator is connected with low-voltage bus bar by step-down transformer, Photovoltaic generation group is connected to low-voltage bus bar.
A kind of energy management controller for wind-light storage micro-grid system the most according to claim 1, it is characterised in that: The power relay of the lead-in circuit breaker side installing band directivity of wind-light storage micro-grid system, power relay is used for judging power side To, the electric current of power relay comes from the electric current at wind-light storage micro-grid system switch cubicle lead-in circuit breaker, power relay Voltage comes from the primary voltage at the lead-in circuit breaker of generating and energy-storage system;When occurring that wind-light storage micro-grid system falls to electrical network During the inverse probability situation of power transmission, reverse-power protection action, disconnect generating and energy-storage system.
A kind of energy management controller for wind-light storage micro-grid system the most according to claim 1, it is characterised in that: Reverse-power protection device, when inverse probability situation occurs, tripping wind-light storage microgrid is installed at the grid-connected switch of wind-light storage micro-grid system The switch that system is connected with system, prevents wind-light storage micro-grid system from falling power transmission to electrical network.
A kind of energy management controller for wind-light storage micro-grid system the most according to claim 1, it is characterised in that: institute State data collecting system and include digital analog I O harvester, relay equipment and electric energy meter, protection supervisory equipment and automatically Weather station, wherein:
Analogue signal IO acquisition function is realized by PLC, and the analogue signal of collection comes from wind, light, each generating equipment of storage and factory The power transducer of each point at district's load, transformator both sides voltage, current transformer, the electricity passed back with dry Transformer Temperature Controller case Signal;Analogue signal IO gather digital signal come from system in each chopper on off operating mode or protection device operating state, PLC drives digital output port to realize the telemechanical operation of the chopper of bus in system simultaneously;
Relay equipment and electric energy meter, protection supervisory equipment for the timing transmission each node power of wind-light storage micro-grid system, voltage, The distribution system parameters such as electric current, electric energy, fault, as energy management monitoring system to the monitoring of wind-light storage micro-grid system and control Foundation;Automatic weather station is used for gathering real time meteorological data.
7. according to a kind of energy management controller for wind-light storage micro-grid system described in claim 1-6 any one, its It is characterised by that its control principle is as follows:
(1) generated output of wind-light storage system is less than plant area's load power, with electrical network input active-power P 1 as reference signal, and root Dynamically adjust the generated output P3 of wind-light storage system according to load power Pload, meet electrical network input active-power P 1 more than setting The requirement of threshold value;
(2) photovoltaic generation runs according to MPPT;
(3) higher limit of wind-power electricity generation peak power is that Pwind-max is by the generated output P3 of wind-light storage system, photovoltaic generation merit Rate, energy storage charge-discharge electric power etc. calculate obtain, as Wind turbines generated output Pwind < Pwind-max, Wind turbines according to MPPT runs, and as Wind turbines generated output Pwind >=Pwind-max, Wind turbines is transported according to Pwind-max invariable power OK;
(4) energy storage device is stabilized algorithm according to setting selection gist and is stabilized scene output pulsation or the recovery of peak load shifting algorithm and confession Needs should be loaded.
A kind of energy management controller for wind-light storage micro-grid system the most according to claim 7, it is characterised in that wind The cutting-in control flow process of light storage micro-grid system is as follows:
Emergency shutdown, off-grid are shut down, and control room is powered by UPS;After safe shutdown, Guan Bi wind-light storage micro-grid system accesses and opens successively Close, 10Kv/690V low-pressure side bus switchs, and system re-powers, and central controller initializes, it may be judged whether to manual operation;
Judge plant area's whether No starting wind-light storage system;
Under the pattern of being incorporated into the power networks, detect electrical network point active power of output P1;Determine whether the working time, when the most operationally Between time, it is judged that the meritorious P1 of electrical network input, whether more than setting threshold value, meets condition, and energy storage device is stabilized according to setting selection gist Algorithm stabilizes scene output pulsation or peak load shifting algorithm reclaims and supply load needs;
Time between operationally, it is judged that whether the meritorious P1 of electrical network input is more than setting threshold value;
P1, more than setting threshold value, the charged initialization of wind-light storage each unit controller, sets the Wind turbines peak power output upper limit Acquisition is calculated by the generated output P3 of wind-light storage system, photovoltaic generation power, energy storage charge-discharge electric power etc. for Pwind-max;
Monitoring system transmits Pwind-max instruction to Wind turbines controller, it is judged that whether Wind turbines receives Pwind-max;
Wind turbines receives Pwind-max, enters control system of wind turbines, waits Wind turbines grid-connected conditions, meets condition, Guan Bi Wind turbines switch;Meanwhile, photovoltaic operates in normal operation state, waits grid-connected condition, meets condition, closes light Volt switch;
When wind-power electricity generation, photovoltaic power generation grid-connecting run, energy storage device is set and operates in grid-connected mode of operation, wait that energy storage is grid-connected Condition, Guan Bi energy storage device switch;
Wind-light storage is incorporated into the power networks, and detects electrical network point active power of output P1, the generated output P3 of wind-light storage system;
Determine whether the working time, the most operationally between time, Wind turbines, photovoltaic safe shutdown, disconnect Wind turbines switch, Photovoltaic switchs;
Time between operationally, it is judged that whether the generated output of wind-light storage system, less than plant area's load power, i.e. P3 < P1, meets Requirement, it is judged that the meritorious P1 >=setting threshold value of electrical network input;Energy storage device is stabilized algorithm according to setting selection gist and is stabilized honourable defeated Go out fluctuation or peak load shifting algorithm reclaims and supply load needs
When P1 >=setting threshold value, set Pwind-max;
When P1≤setting threshold value, set Pwind-max and judge that Pwind-max value of calculation, whether less than or equal to 0, meets bar Part, sets aerogenerator unit safe and shuts down;
After aerogenerator unit safe is shut down, when again judging P1≤setting threshold value, photovoltaic and energy storage device safe shutdown.
CN201410288149.4A 2014-06-25 2014-06-25 A kind of energy management controller for wind-light storage micro-grid system CN104052159B (en)

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