CN104319876B - Concentrated area, a kind of new forms of energy power station intelligence control device and method - Google Patents

Abstract

The invention discloses an intelligent management and control device and method for a centralized area of a new energy power station, which realizes intelligent management, access stability control, and energy optimization control of the new energy power station, wherein the intelligent management includes integrated regional centralized management and intelligent planning deployment The integrated management realizes the orderly management of new energy power stations; the access stability control solves the safety hazards caused by the volatility and randomness of new energy to the stable operation of the power grid; the energy optimization control adopts time-based energy control strategies and real-time The closed-loop error correction technology achieves the ideal effect of peak shaving and valley filling. The integrated realization technology of the present invention not only reduces the number of devices, lowers the cost, is economical and environmentally friendly, but also realizes the sharing of data, information and calculation results among different functions, realizes optimal control, and ensures the stable operation and energy optimization of the power grid. Control is of great significance and has a good application prospect.

Description

A new energy power station centralized area intelligent management and control device and method

technical field

The invention relates to an intelligent management and control device and method for a concentrated area of a new energy power station, belonging to the technical field of new energy access and distribution network.

Background technique

With the vigorous development of new energy, new energy power stations are connected to the distribution network on a large scale. At present, there is no effective management device for new energy power stations. A large number of new energy power stations are in an unsupervised state. In addition, due to the randomness and volatility of new energy sources, it also poses safety hazards to the stability of the power grid. It is urgent to study an intelligent control device for centralized areas of new energy power stations. This device can not only realize the control of regional new energy Centralized management, and can realize the stable control and energy control technology of new energy area access, to ensure the stable and safe operation of the power grid.

Contents of the invention

The purpose of the present invention is to solve the potential safety hazards caused by the large-scale disorderly access of new energy power stations and the randomness and volatility of new energy sources to the stable operation of the power grid. The integrated functions of intelligent management, access stability control and energy optimization control of new energy power plants are of great significance to ensure the stable operation of the power grid and have good application prospects.

In order to achieve the above object, the present invention adopts the following technical solutions:

An intelligent management and control device in a centralized area of a new energy power station, including a chassis, a panel, and a plug-in; the plug-in is plugged into the backplane bus of the chassis, and the plug-in includes a power supply PWM plug-in, a control MCP plug-in, an AC collection plug-in, input and output BIO plug-in, optical fiber OTH plug-in, serial port COM plug-in, wireless WX plug-in, of which:

Power PWM plug-in, used to provide device working power and remote signaling power;

The management and control MCP plug-in includes the management CPU and the control CPU. The management CPU includes the upper computer processing module and the management module. The upper computer processing module has a built-in FLASH area, and the deployment forwarding table is preset in the FLASH area. The information is forwarded to the deployment center according to the order of the deployment and forwarding table. The management module is used to realize regional centralized management and intelligent planning and deployment integrated management; the control CPU is used to realize access stability control and energy optimization control. The control CPU and the management The CPU performs real-time data interaction through dual-port RAM;

Acquisition AC plug-in, used to collect busbar, incoming line, centralized energy storage line current, voltage, and all AC analog quantities connected to new energy power station lines, perform filtering, acquisition and protection, A/D conversion and analog quantity calculation, and pass The CAN bus interacts with the control CPU controlling the MCP plug-in for analog computation;

Input and output BIO plug-ins are used to process remote signaling and export control. After remote signaling processing, the collected switching values are sent to the control CPU that controls the MCP plug-in through the CAN bus, and receive the control CPU that controls the MCP plug-in through the CAN bus. Export control, reactive power adjustment, energy storage adjustment commands, and execute control commands to control the CPU;

Optical fiber OTH plug-in, used to realize communication with the grid-connected interface device of the long-distance new energy station through optical fiber;

Serial port COM plug-in, used to realize communication with short-distance new energy station grid-connected interface devices, energy storage management units, reactive power compensation management units, and debugging tools through cables;

Wireless WX plug-in, used to realize wireless local area communication and GPRS communication with the grid-connected interface device of the new energy station;

The power supply PWM plug-in and the control MCP plug-in are fixedly plugged into the 1# and 2# slots of the chassis, and the rest of the plug-ins are arranged in any slots of the chassis.

The aforementioned optical fiber OTH plug-in includes eight optical fiber Ethernet ports.

The aforementioned serial port COM plug-in includes 16 RS485 communication ports.

The aforementioned wireless WX plug-in includes 433M local area wireless communication and GPRS communication.

A method for intelligently controlling the concentrated area of the new energy power station by using the intelligent management and control device in the concentrated area of the new energy power station, including intelligent management, access stability control and energy optimization control of the new energy power station;

The intelligent management of new energy power stations includes centralized management of new energy power stations in the region and integrated management of intelligent planning and deployment.

The centralized management of new energy power stations in the region includes the following steps:

11) The intelligent management and control device selects the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in according to the communication medium of the connected new energy power station;

12) The intelligent management and control device configures communication parameters through the liquid crystal interface;

13) For each connected new energy power station, power station information needs to be provided according to the configuration template;

14) When the management and control MCP plug-in is powered on for the first time or the configuration template is updated, it automatically analyzes the configuration template of each connected power station, and dynamically opens the telemetry database, remote signaling database, power statistics database, operating status database, and faults in the RAM area. Alarm information database;

15) The management and control MCP plug-in is configured according to the communication parameters in step 12), establishes a communication connection with the new energy power station interface device through wired or wireless means, receives the power station information of the new energy power station interface device in real time and stores it in the corresponding step 14). In the database, the telemetry data is stored in the telemetry database, the remote signaling data is stored in the remote signaling database, the power generation data is stored in the electricity statistics database, and the fault alarm data is stored in the fault alarm information database;

16) The control MCP plug-in manages the database of the step 14), and the telemetry database sets an over-limit threshold, which generates a telemetry over-limit alarm record if the threshold is exceeded; changes in the remote signaling data generate a remote signaling displacement record; power statistics database Set the threshold of the maximum power generation, and generate an alarm record of the power generation exceeding the threshold; if the telemetry and telesignaling data information of a certain power station has not been received for three consecutive times, set the bad flag of the power station's operation status, otherwise set the health flag of the operation state, And store the running status flag in the running status library;

17) control the MCP plug-in according to the allocation and forwarding table of its upper computer module FLASH area, the database data and the alarm record in the described step 14) are sent to the superior allocation center;

18) At 0:00 every day, the control MCP plug-in performs statistical analysis on the electricity of the electricity statistics database of the previous day, forms the daily electricity generation data and reports of each new energy line, and stores them in the daily electricity generation statistics area of the FLASH area of the upper computer module , the daily power generation statistics area circulates and saves the latest 60-day daily power generation statistics data of each power station;

19) At 0:00 on the 1st of each month, the control MCP plug-in performs statistical analysis on the electricity in the electricity statistics database of the previous month, forms the monthly electricity generation data and reports of each new energy line, and stores them in the monthly data in the FLASH area of the host computer module. Power generation statistics area, the monthly power generation statistics area keeps the latest power generation statistical data of each power station in December;

The integrated management of intelligent planning and deployment includes the following steps:

21) The upper computer module that controls the MCP plug-in receives the deployment command message of the upper computer in real time;

22) The control MCP plug-in will receive the command message and analyze it, and enter the processing flow step 23) after the analysis is correct;

23) If it is judged that the daily power generation plan command is received, the daily total power generation plan value is stored in the daily power generation plan deployment planning area of the FLASH area, and then go to step 24); if it is a monthly power generation plan order, the monthly total power generation The planned value is stored in the monthly power generation plan allocation area of the FLASH area, and enters step 27), otherwise, ends;

24) According to the daily power generation statistical area data in the FLASH area of each power station, the daily power generation of the power station is estimated and counted, and the formula is:

Among them, wR _{k is estimated} to be the estimated value of daily power generation of the kth power station, and wR _ki is the statistical data of daily power generation of the kth power station on the i-th day;

25) Calculate the daily power distribution ratio of each power station, the formula is:

Among them, RAT _k is the distribution ratio of daily power generation of the kth power station, wR _{i is estimated} to be the estimated value of daily power generation of the i-th power station, and m is the number of all power stations connected to the control device;

26) Distribute the total daily power generation plan value stored in the FLASH area in step 23) to each power station according to the ratio of step 25), forming the daily power generation plan value of each power station, and enter step 30), each power station The formula for calculating the planned value of daily power generation is:

WR _{k plan} = _{total WR plan} * RAT _k

Wherein, the WR _{k plan} is the daily power generation plan value of the kth power station, and the WR _{plan is always} the daily total power generation plan value stored in FLASH in the step 23);

27) According to the monthly power generation statistical area data in the FLASH area of each power station, the monthly power generation of the power station is estimated and counted, and the formula is:

Among them, wM _{k is estimated} as the estimated monthly power generation of the kth power station, and wM _ki is the monthly power generation statistics of the kth power station in the i-th month;

28) Calculate the monthly power distribution ratio of each power station, the formula is:

Among them, MAT _k is the monthly power distribution ratio of the k-th power station, wM _{i is estimated} to be the estimated monthly power generation of the i-th power station, and m is the number of all power stations connected to the control device;

29) Distribute the monthly total power generation plan value stored in the FLASH area in step 23) to each power station according to the ratio of step 28), forming the monthly power generation plan value of each power station, and enter step 30), each power station The formula for calculating the planned value of daily power generation is:

WM _{k plan} = _{total WM plan} * MAT _k

Wherein, the WM _{k plan} is the monthly power generation plan value of the kth power station, and the WM _{plan is always} the monthly total power generation plan value stored in FLASH in step 23);

30) Send the planned value of daily power generation or monthly power generation to each new energy line interface device through the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in;

The described stabilizing control of access to the new energy power station includes the following steps:

31) The intelligent management and control device configures the power quality parameters through the liquid crystal, pre-configures the centralized reactive power compensation control strategy in the FLASH area of the control MCP plug-in, and sets the power quality control flag = 0;

32) Acquisition of AC plug-in for analog acquisition of bus voltage, incoming current, and current of all incoming and outgoing lines;

33) The acquisition AC plug-in calculates the voltage, the 25th harmonic content rate of the incoming line current, and the 25th harmonic content rate of all outgoing line currents based on the collected bus voltage, incoming line current, and connected outgoing line current, and calculates the total Active power, total reactive power, total power factor and active power, reactive power and power factor of all outgoing lines;

34) Collect the AC plug-in and transmit the calculation result of step 33) to the control MCP plug-in through the CAN bus;

35) Control the MCP plug-in to detect the voltage amplitude, voltage harmonic content rate, total incoming line current harmonic content rate and total power factor in real time, and judge the incoming line power quality index. If it is unqualified, go to step 36); otherwise, return to step 32 );

36) If the power quality control flag=0, go to step 37); if the power quality control flag=1, go to step 39);

37) According to the centralized reactive power compensation control strategy configured in step 31), automatic switching of the centralized reactive power compensation device;

38) After the automatic switching control of the centralized reactive power compensation is completed, the power quality control flag = 1 is set after a delay of 5 minutes; return to step 32);

39) The control MCP plug-in sorts all outgoing lines with unqualified power quality according to the harmonic content of the outgoing current from large to small, and controls the unqualified power quality of the line in step 31) for the outgoing line with the largest current harmonic content The configuration of the parameter is controlled, if the parameter is an alarm and enters step 40), if it is a trip, enters step 41);

40) Send an alarm to the new energy grid-connected interface device through the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in, and send an alarm command to the upper-level deployment center through the host computer module. After a delay of 5 minutes, return to step 32);

41) Jump off the circuit breaker of the new energy line, and send an alarm command to the superior allocation center through the upper computer module through the remote signal of the position of the circuit breaker and the reason; after a delay of 5 minutes, return to step 32);

The energy optimization control comprises the following steps:

51) The upper computer module that controls the MCP plug-in receives the electricity price peak, peak time period, valley time period and peace time period information of the upper computer in real time;

52) The AC plug-in collects the analog quantity of the incoming line, and calculates the active power, reactive power,

power factor;

53) Calculate the energy storage control target at 0:00 every day, the formula is as follows;

M _control = (WR _{plan total} - W _peak - W _peak - W _valley - W _level ) * 60/(24*60 - T _peak - T _peak - T _valley )

Among them, M _control is the control target of centralized energy storage, WR _{plan is the total} daily power generation plan value, W _peak is the total power generation statistics data of the peak period of the previous day in the region, W _peak is the total power generation statistics data of the peak period of the previous day in the region, W _Valley is the total power generation statistics of the previous day's valley period in the region, W _Flat is the total power generation statistics of the previous day's normal time period in the region, T _peak is the peak time period, T _peak is the peak time period, and T _valley is the valley time period of time;

54) During the peak and peak time periods, control the discharge of the centralized energy storage, send the maximum power generation plan command to the interface device of the new energy power station, and calculate, count and save the peak value of the day in real time according to the collected and calculated values in step 52) The total power generation in the time period W _peak , the total power generation in the peak time period W _peak ;

55) During the off-peak time period, perform charging control on the centralized energy storage, send the minimum power generation plan command to the interface device of the new energy power station, and calculate, count and save the off-peak time period of the day in real time according to the collected and calculated values in step 52) Total power generation W _Valley ;

56) In the normal time period, control the centralized energy storage according to the energy storage control target. If M _control >0, perform discharge control, and if M _control <0, perform charge control; and according to the collected and calculated values in step 52), real-time Calculate, count and save the total power generation W _level of the average time period of the day;

57) During the normal time period, the AC plug-in collects the current and voltage of the centralized energy storage line in real time, and _calculates the power generation value M of the energy storage line;

58) In the normal time period, the energy storage control target is corrected according to the error between the real-time calculated M _control and the M _calculation , and the calculation formula is:

M' _control = M _control + (M _control - M _calculation )

Among them, M'control is the actual power generation _control target of centralized energy storage;

59) In the normal time period, use the M' _control target to control the centralized energy storage, that is, M _control = M' _control , and then return to step 56) to achieve the target of closed-loop real-time error correction.

In the aforementioned step 12), the communication parameter configuration includes protocol selection and parameter configuration, and the protocol selection includes IEC61850 protocol, 101 protocol, 104 protocol, modbus protocol, and self-defined protocol; the parameter configuration includes interface mode and communication settings, so The interface modes mentioned above include Ethernet, serial port, local area wireless and GPRS mode. Selecting a different interface mode will automatically pop up the communication setting menu of this mode.

In the aforementioned step 13), the power station information includes telemetry information, remote signaling information, new energy power generation, load power, power station operating status, and fault alarm operation information of the power station.

In the aforementioned step 31), the power quality parameters include the low voltage threshold, the high voltage threshold, the harmonic content rate threshold, the power factor qualified threshold and the unqualified power quality control parameters set by all outgoing lines. Quality failure control parameters include alarm and trip.

In the aforementioned step 35), the criterion for judging that the incoming power quality is unqualified is that the voltage amplitude is higher than the overvoltage threshold set in the step 31), or the voltage amplitude is lower than the threshold set in the step 31). The voltage is too low threshold, or the voltage harmonic content exceeds the harmonic content threshold, or the incoming current harmonic content exceeds the harmonic content threshold, or the total power factor is lower than the power factor qualified threshold, then judge The incoming power quality is unqualified.

In the aforementioned step 39), the judgment standard for the unqualified power quality of the outgoing line is that the harmonic content rate of the outgoing line current exceeds the threshold value of the harmonic content rate or the power factor is lower than the qualified threshold value of the power factor, then it is judged that the power quality of the outgoing line is unqualified line.

The benefits of the present invention are:

1) Intelligent management adopts regional centralized management and integrated management of planning and deployment to realize intelligent management of new energy concentrated areas, in which regional centralized management of telemetry, remote signaling, new energy power generation, and load of new energy power stations in the area Collect, statistically analyze, and forward information on electricity consumption, power station operating status, and fault alarm operation information, and form power generation statistical data, realizing effective centralized management of new energy power stations; planning and deployment integration receives and deploys plans and forms according to regional base station management. The power generation statistical data of the line is used to allocate the power generation plan to form the power generation plan of each power station, and realize the planned deployment of new energy power generation;

2) The access stability control of the present invention adopts reactive power compensation and power quality comprehensive control technology, which solves the safety and stability problems brought by the randomness and volatility of new energy sources to the power grid. On-site analog quantity collection, calculation and power quality monitoring, through the comprehensive control technology of reactive power compensation priority and unqualified power quality, ensure the stable operation of the power grid;

3) The energy optimization control of the present invention adopts a time-segmented energy control strategy and closed-loop error correction technology to achieve the ideal effect of peak shaving and valley filling.

Description of drawings

Fig. 1 is a schematic configuration diagram of the intelligent management and control device in the concentrated area of the new energy power station of the present invention;

Fig. 2 The integrated management process of intelligent planning and deployment of the intelligent management and control device in the centralized area of the new energy power station of the present invention;

Fig. 3 The access and stability control flow of the intelligent management and control device in the concentrated area of the new energy power station of the present invention;

Fig. 4 The energy optimization control flow of the intelligent management and control device in the concentrated area of the new energy power station of the present invention.

detailed description

The present invention will be described in further detail in conjunction with the accompanying drawings and specific embodiments.

The intelligent management and control device in the concentrated area of the new energy power station of the present invention includes a chassis, a panel, and a plug-in. All plug-ins are plugged into the backplane bus of the chassis. Plug-in, optical fiber OTH plug-in, serial port COM plug-in, wireless WX plug-in, the functions of each plug-in are as follows:

Power PWM plug-in, used to provide device working power and remote signaling power.

Management and control MCP plug-in, this plug-in is the main plug-in for the realization of the management and control function, including the management CPU and the control CPU. The management CPU includes the upper computer processing module and the management module. The computer processing module is used to receive deployment commands and forward the information to the deployment center according to the order of the deployment forwarding table. The management module is used to realize regional centralized management and intelligent planning and deployment integrated management; the control CPU is used to realize access stability control and energy optimization control , the control CPU and the management CPU perform real-time data interaction through a dual-port RAM.

Acquisition AC plug-in, used to collect busbar, incoming line, centralized energy storage line current, voltage, and all AC analog quantities connected to new energy power station lines, perform filtering, acquisition and protection, A/D conversion and analog quantity calculation, and pass The CAN bus interacts with the control CPU controlling the MCP plug-in for analog computation.

Input and output BIO plug-ins are used to process remote signaling and export control. After remote signaling processing, the collected switching values are sent to the control CPU of the MCP plug-in through the CAN bus, and the control CPU of the MCP plug-in is received through the CAN bus. Export control, reactive power adjustment, energy storage adjustment commands, and execute control commands to control the CPU.

Optical fiber OTH plug-in, including eight optical fiber Ethernet ports, is used to realize communication with long-distance new energy power station grid-connected interface devices through optical fiber.

Serial port COM plug-in, including 16 RS485 communication ports, used to communicate with the short-distance new energy station grid-connected interface device, energy storage management unit, reactive power compensation management unit, and debugging tools through cables.

Wireless WX plug-in, including 433M local area wireless communication and GPRS communication, is used to realize wireless local area communication and GPRS communication with the grid-connected interface device of the new energy station.

The above-mentioned power supply PWM plug-in and control MCP plug-in are fixedly plugged in the 1# and 2# slots of the chassis, and the rest of the plug-ins are all smart plug-ins, and the number of plug-ins can be selected according to needs, and the telemetry messages are sent between the smart plug-ins through the CAN bus , remote signaling message, control message, command message transmission, the plug-in can be configured in any slot position, so as to meet the diverse needs of the actual project site area for different power station access numbers and different access media.

As shown in Figure 1, it is an embodiment of the intelligent management and control device in the concentrated area of the new energy power station of the present invention, which has 13 plug-ins in total from left to right, and the plug-in configuration includes power supply PWM plug-in (1 block), control MPU plug-in (1 block) ), analog quantity acquisition AC plug-in (3 pieces), input and output BIO plug-in (3 pieces), optical fiber OTH plug-in (2 pieces), serial port COM plug-in (2 pieces), wireless WX plug-in (1 piece). The above-mentioned plug-ins are plugged into the bus backplane of the chassis.

The intelligent management and control device for the concentrated area of the new energy power station of the present invention can realize the intelligent management, access stability control and energy optimization control of the concentrated area of the new energy power station.

Among them, intelligent management realizes the centralized management of new energy power stations in the region and the integrated function of intelligent planning and deployment. Fault alarm operation information collection, on the one hand, forward the information to the superior deployment system according to the deployment forwarding table, to realize the centralized management of the new energy area, and on the other hand, make statistics on the daily power generation data and monthly power generation data of the new energy lines to form power generation statistical data and curves; intelligent plan deployment management receives the superior daily deployment plan or monthly deployment plan, forms daily power generation deployment plan and monthly power generation deployment plan of each power station according to the daily power generation statistics data or monthly power generation statistics data of each line, and performs intelligent plan distribution.

Centralized management of new energy power stations in the region includes the following steps:

11) The intelligent management and control device selects the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in according to the communication medium of the connected new energy power station;

12) The intelligent management and control device configures communication parameters through the liquid crystal interface, including protocol selection and parameter configuration. Protocol selection includes IEC61850 protocol, 101 protocol, 104 protocol, modbus protocol, and custom protocol; parameter configuration includes interface mode and communication settings. Among them, The interface mode includes Ethernet, serial port, LAN and GPRS mode. Selecting a different interface mode will automatically pop up the communication setting menu of this mode. For example, selecting the Ethernet mode will pop up the IP address, subnet mask and network port enabled. Setting menu; select the serial port mode will automatically pop up the setting menu of serial port baud rate, data bit, stop bit, parity bit and enable; select GPRS mode will automatically pop up the setting menu of GPRS address, GPRS port number and enable; select 433M LAN mode will automatically pop up the maximum number of connections and enable setting menu;

13) For each connected new energy power station, power station information needs to be provided according to the configuration template. The power station information includes telemetry information, remote signaling information, new energy power generation, load power, power station operating status, and fault alarm operation information.

14) When the control MCP plug-in is powered on for the first time or the configuration template is updated, it automatically analyzes the configuration template of each access station, and dynamically opens the telemetry database, remote signaling database, power statistics database, operating status database, fault Alarm information database;

15) Control the MCP plug-in according to the communication parameter configuration in step 12), establish a communication connection with the interface device of the new energy power station through wired or wireless means, receive the power station information of the interface device of the new energy power station in real time and store it in the corresponding database in step 14) Among them, the telemetry data is stored in the telemetry database, the remote signaling data is stored in the remote signaling database, the power generation data is stored in the electricity statistics database, and the fault alarm data is stored in the fault alarm information database;

16) Manage and control the MCP plug-in to manage the database in step 14). The telemetry database sets an over-limit threshold, and if the threshold is exceeded, a telemetry over-limit alarm record is generated; if there is a change in the remote signaling data, a remote signaling displacement record is generated; the power statistics database is set to the maximum Threshold of power generation, if the threshold is exceeded, an alarm record of power generation will be generated; if the telemetry and telesignaling data information of a certain power station has not been received for three consecutive times, the power station will be set as a bad flag, otherwise it will be set as a healthy flag, and the running state will The flag is stored in the running state library;

17) The control MCP plug-in sends the database data and alarm records in step 14) to the superior deployment center according to the deployment forwarding table in the FLASH area of its host computer module;

18) At 0:00 every day, the control MCP plug-in performs statistical analysis on the electricity of the electricity statistics database of the previous day, forms the daily electricity generation data and reports of each new energy line, and stores them in the daily electricity generation statistics area of the FLASH area of the upper computer module , the daily power generation statistics area circulates and saves the latest 60-day daily power generation statistics data of each power station;

19) At 0:00 on the 1st of each month, the control MCP plug-in performs statistical analysis on the electricity in the electricity statistics database of the previous month, forms the monthly electricity generation data and reports of each new energy line, and stores them in the monthly data in the FLASH area of the host computer module. Power generation statistics area, the monthly power generation statistics area cyclically saves the latest December power generation statistics of each power station.

As shown in Figure 2, the integrated management of intelligent planning and allocation includes the following steps:

21) The upper computer module that controls the MCP plug-in receives the deployment command message of the upper computer in real time;

22) The control MCP plug-in will receive the command message for analysis, and enter the processing flow after the analysis is correct;

23) If it is judged that the daily power generation plan command is received, the daily total power generation plan value is stored in the daily power generation plan deployment planning area of the FLASH area, and then go to step 24); if it is a monthly power generation plan order, the monthly total power generation The planned value is stored in the monthly power generation plan allocation area of the FLASH area, and enters step 27), otherwise, ends;

24) According to the daily power generation statistical area data in the FLASH area of each power station, the daily power generation of the power station is estimated and counted, and the formula is:

Among them, wR _{k is estimated} to be the estimated value of daily power generation of the kth power station, wR _ki is the statistical data of daily power generation of the kth power station on the i-th day, is the sum of the daily power generation data of the kth power station in the last 60 days;

25) Calculate the daily power distribution ratio of each power station, the formula is:

Among them, RAT _k is the distribution ratio of daily power generation of the kth power station, wR _{i is estimated} to be the estimated value of daily power generation of the i-th power station, m is the number of all power stations connected to the control device, It is the sum of estimated daily power generation values of all power stations connected to the control device;

26) Distribute the total daily power generation plan value stored in the FLASH area in step 23) to each power station according to the ratio of step 25), forming the daily power generation plan value of each power station, and enter step 30), the daily power generation plan of each power station The value calculation formula is:

WR _{k plan} = _{total WR plan} * RAT _k

Wherein, the WR _{k plan} is the daily power generation plan value of the kth power station, and the WR _{plan is always} the daily total power generation plan value stored in FLASH in step 23);

27) According to the monthly power generation statistical area data in the FLASH area of each power station, the monthly power generation of the power station is estimated and counted, and the formula is:

Among them, wM _{k is estimated} to be the estimated value of monthly power generation of the kth power station, wM _ki is the monthly power generation statistics of the kth power station in month i, is the sum of the monthly power generation statistical data of the kth power station in the last 12 months;

28) Calculate the monthly power distribution ratio of each power station, the formula is:

Among them, MAT _k is the monthly power distribution ratio of the kth power station, wM _{i is estimated} to be the estimated value of the monthly power generation of the i-th power station, m is the number of all power stations connected to the control device, It is the sum of estimated monthly power generation values of all power stations connected to the control device;

29) Distribute the monthly total power generation plan value stored in the FLASH area in step 23) to each power station according to the ratio of step 28), forming the monthly power generation plan value of each power station, and enter step 30), the daily power generation plan of each power station The value calculation formula is:

WM _{k plan} = _{total WM plan} * MAT _k

Wherein, the WM _{k plan} is the monthly power generation plan value of the kth power station, and the WM _{plan is always} the monthly total power generation plan value stored in FLASH in step 23);

30) Send the planned value of daily power generation or monthly power generation to each new energy line interface device through the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in.

As shown in Figure 3, the access stability control of the new energy power station includes the following steps:

31) The intelligent management and control device configures the power quality parameters through the liquid crystal, pre-configures the centralized reactive power compensation control strategy in the FLASH area of the control MCP plug-in, and sets the power quality control flag = 0; High threshold, threshold of harmonic content rate, qualified threshold of power factor and unqualified power quality control parameters for all outgoing lines, among which, unqualified power quality control parameters include alarm and trip;

32) Acquisition of AC plug-in for analog acquisition of bus voltage, incoming current, and current of all incoming and outgoing lines;

33) The acquisition AC plug-in calculates the voltage, the 25th harmonic content rate of the incoming line current, and the 25th harmonic content rate of all outgoing line currents based on the collected bus voltage, incoming line current, and connected outgoing line current, and calculates the total Active power, total reactive power, total power factor and active power, reactive power, power factor of all outgoing lines;

34) Collect the AC plug-in and transmit the calculation result of step 33) to the control MCP plug-in through the CAN bus;

35) Control the MCP plug-in to detect the voltage, voltage harmonic content rate, total incoming line current harmonic content rate and total power factor in real time, and judge the incoming line power quality index. If it is unqualified, go to step 36); otherwise, return to step 32). The judgment standard for the unqualified incoming power quality is that the voltage amplitude is higher than the overvoltage threshold set in step 31), or the voltage amplitude is lower than the undervoltage threshold set in step 31), or the voltage harmonics contain If the harmonic content rate exceeds the threshold value of the harmonic content rate, or the harmonic content rate of the incoming line current exceeds the threshold value of the harmonic content rate, or the total power factor is lower than the qualified threshold value of the power factor, it is judged that the power quality of the incoming line is unqualified;

36) If the power quality control flag=0, go to step 37); if the power quality control flag=1, go to step 39);

37) According to the centralized reactive power compensation control strategy configured in step 31), automatic switching of the centralized reactive power compensation device;

38) After the automatic switching control of the centralized reactive power compensation is completed, the power quality control flag = 1 is set after a delay of 5 minutes; return to step 32);

39) The control MCP plug-in sorts all outgoing lines with unqualified power quality according to the harmonic content of the outgoing current from large to small, and controls the unqualified power quality of the line in step 31) for the outgoing line with the largest current harmonic content If the parameter is an alarm, go to step 40), if it is a trip, go to step 41); the judgment standard for the unqualified power quality of the outgoing line is that the harmonic content rate of the outgoing line current exceeds the threshold value of the harmonic content rate or the power factor If the power factor is lower than the qualified threshold, it is judged that the outgoing line is a line with unqualified power quality;

40) Send an alarm to the new energy grid-connected interface device through the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in, and send an alarm command to the upper-level deployment center through the host computer module. After a delay of 5 minutes, return to step 32);

41) Jump off the circuit breaker of the new energy line, and send an alarm command to the superior allocation center through the upper computer module through the remote signal of the position of the circuit breaker and the reason; after a delay of 5 minutes, return to step 32).

In the above-mentioned process of stabilizing the connection of new energy power stations, when it is detected that the power quality is unqualified, the centralized reactive power compensation is given priority according to the reactive power compensation strategy. It ensures the stable operation of the power grid and avoids the problem of frequent disconnection of lines caused by short-term fluctuations in new energy sources.

As shown in Figure 4, the energy optimization control of new energy power plants includes the following steps:

51) The upper computer module that controls the MCP plug-in receives the electricity price peak, peak time period, valley time period and peace time period information of the upper computer in real time;

52) The AC plug-in collects the analog quantity of the incoming line, and calculates the active power, reactive power,

power factor;

53) Calculate the energy storage control target at 0:00 every day, the formula is as follows;

M _control = (WR _{plan total} - W _peak - W _peak - W _valley - W _level ) * 60/(24*60 - T _peak - T _peak - T _valley )

Among them, M _control is the control target of centralized energy storage, WR _{plan is the total} daily power generation plan value, W _peak is the total power generation statistics data of the peak period of the previous day in the region, W _peak is the total power generation statistics data of the peak period of the previous day in the region, W _valley is the total power generation statistics of the valley period of the previous day in the area, W _flat is the total power generation statistics of the previous day’s flat time period in the area, T _peak is the peak time period (minutes), T _peak is the peak time period (minutes) , T _valley is the valley time period (minutes);

54) During the peak and peak time periods, control the discharge of the centralized energy storage, send the maximum power generation plan command to the interface device of the new energy power station, and calculate, count and save the peak value of the day in real time according to the collected and calculated values in step 52) The total power generation in the time period W _peak , the total power generation in the peak time period W _peak ;

55) During the off-peak time period, perform charging control on the centralized energy storage, send the minimum power generation plan command to the interface device of the new energy power station, and calculate, count and save the off-peak time period of the day in real time according to the collected and calculated values in step 52) Total power generation W _Valley ;

56) In the normal time period, control the centralized energy storage according to the energy storage control target. If M _control >0, perform discharge control, and if M _control <0, perform charge control; and according to the collected and calculated values in step 52), real-time Calculate, count and save the total power generation W _level of the average time period of the day;

57) During the normal time period, the AC plug-in collects the current and voltage of the centralized energy storage line in real time, and _calculates the power generation value M of the energy storage line;

58) In the normal time period, the energy storage control target is corrected according to the error between the real-time calculated M _control and the M _calculation , and the calculation formula is:

M' _control = M _control + (M _control - M _calculation )

Among them, M'control is the actual power generation _control target of centralized energy storage;

59) In the normal time period, use the M' _control target to control the centralized energy storage, that is, M _control = M' _control , and then return to step 56) to achieve the target of closed-loop real-time error correction.

In the energy optimization control process of the above-mentioned new energy power station, different energy storage control strategies are adopted through the peak, peak, valley, and flat time periods, and the closed-loop error real-time correction technology is adopted to realize the optimal control of peak shaving and valley filling.

Claims (9)

1. A method for intelligent management and control of intelligent management and control devices in centralized areas of new energy power stations, characterized in that: The intelligent management and control device in the concentrated area of the new energy power station includes a chassis, a panel, and a plug-in; the plug-in is plugged into the backplane bus of the chassis, and the plug-in includes a power supply PWM plug-in, a control MCP plug-in, a collection AC plug-in, input and output BIO plug-in, optical fiber OTH plug-in, serial port COM plug-in, wireless WX plug-in, of which: Power PWM plug-in, used to provide device working power and remote signaling power; The management and control MCP plug-in includes the management CPU and the control CPU. The management CPU includes the upper computer processing module and the management module. The upper computer processing module has a built-in FLASH area, and the deployment forwarding table is preset in the FLASH area. The information is forwarded to the deployment center according to the order of the deployment and forwarding table. The management module is used to realize regional centralized management and intelligent planning and deployment integrated management; the control CPU is used to realize access stability control and energy optimization control. The control CPU and the management The CPU performs real-time data interaction through dual-port RAM; Acquisition AC plug-in, used to collect busbar, incoming line, centralized energy storage line current, voltage, and all AC analog quantities connected to new energy power station lines, perform filtering, acquisition and protection, A/D conversion and analog quantity calculation, and pass The CAN bus interacts with the control CPU controlling the MCP plug-in for analog computation; Input and output BIO plug-ins are used to process remote signaling and export control. After remote signaling processing, the collected switching values are sent to the control CPU that controls the MCP plug-in through the CAN bus, and receive the control CPU that controls the MCP plug-in through the CAN bus. Export control, reactive power adjustment, energy storage adjustment commands, and execute control commands to control the CPU; Optical fiber OTH plug-in, used to realize communication with the grid-connected interface device of the long-distance new energy station through optical fiber; Serial port COM plug-in, used to realize communication with short-distance new energy station grid-connected interface devices, energy storage management units, reactive power compensation management units, and debugging tools through cables; Wireless WX plug-in, used to realize wireless local area communication and GPRS communication with the grid-connected interface device of the new energy station; The power supply PWM plug-in and the control MCP plug-in are fixedly plugged into the 1# and 2# slot positions of the chassis, and the rest of the plug-ins are configured in any slot position of the chassis; The intelligent management and control method includes intelligent management of new energy power plants, access stability control and energy optimization control; The intelligent management of new energy power stations includes centralized management of new energy power stations in the region and integrated management of intelligent planning and deployment. The centralized management of new energy power stations in the region includes the following steps: 11) The intelligent management and control device selects the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in according to the communication medium of the connected new energy power station; 12) The intelligent management and control device configures communication parameters through the liquid crystal interface; 13) For each connected new energy power station, power station information needs to be provided according to the configuration template; 14) When the management and control MCP plug-in is powered on for the first time or the configuration template is updated, it automatically analyzes the configuration template of each connected power station, and dynamically opens the telemetry database, remote signaling database, power statistics database, operating status database, and faults in the RAM area. Alarm information database; 15) The management and control MCP plug-in is configured according to the communication parameters in step 12), establishes a communication connection with the new energy power station interface device through wired or wireless means, receives the power station information of the new energy power station interface device in real time and stores it in the corresponding step 14). In the database, the telemetry data is stored in the telemetry database, the remote signaling data is stored in the remote signaling database, the power generation data is stored in the electricity statistics database, and the fault alarm data is stored in the fault alarm information database; 16) The control MCP plug-in manages the database of the step 14), and the telemetry database sets an over-limit threshold, which generates a telemetry over-limit alarm record if the threshold is exceeded; changes in the remote signaling data generate a remote signaling displacement record; power statistics database Set the threshold of the maximum power generation, and generate an alarm record of the power generation exceeding the threshold; if the telemetry and telesignaling data information of a certain power station has not been received for three consecutive times, set the bad flag of the power station's operation status, otherwise set the health flag of the operation state, And store the running state flag into the running state library; 17) control the MCP plug-in according to the allocation and forwarding table of its upper computer module FLASH area, the database data and the alarm record in the described step 14) are sent to the superior allocation center; 18) At 0:00 every day, the control MCP plug-in conducts statistical analysis on the electricity of the electricity statistics database of the previous day, forms the daily electricity generation data and reports of each new energy line, and stores them in the daily electricity generation statistics area of the FLASH area of the host computer module , the daily power generation statistics area cyclically saves the latest 60-day daily power generation statistics data of each power station; 19) At 0:00 on the 1st of each month, the control MCP plug-in performs statistical analysis on the electricity in the electricity statistics database of the previous month, forms the monthly electricity generation data and reports of each new energy line, and stores them in the monthly data in the FLASH area of the host computer module. Power generation statistics area, the monthly power generation statistics area keeps the latest power generation statistical data of each power station in December; The integrated management of intelligent planning and deployment includes the following steps: 21) The upper computer module that controls the MCP plug-in receives the deployment command message of the upper computer in real time; 22) The control MCP plug-in will receive the command message and analyze it, and enter the processing flow step 23) after the analysis is correct; 23) If it is judged that the daily power generation plan command is received, the daily total power generation plan value is stored in the daily power generation plan deployment planning area of the FLASH area, and then go to step 24); if it is a monthly power generation plan order, the monthly total power generation The planned value is stored in the monthly power generation plan allocation area of the FLASH area, and enters step 27), otherwise, ends; 24) According to the daily power generation statistical area data in the FLASH area of each power station, the daily power generation of the power station is estimated and counted, and the formula is: Among them, wR _{k is estimated} to be the estimated value of daily power generation of the kth power station, and wR _ki is the statistical data of daily power generation of the kth power station on the i-th day; 25) Calculate the daily power distribution ratio of each power station, the formula is: Among them, RAT _k is the distribution ratio of daily power generation of the kth power station, wR _{i is estimated} to be the estimated value of daily power generation of the i-th power station, and m is the number of all power stations connected to the control device; 26) Distribute the total daily power generation plan value stored in the FLASH area in step 23) to each power station according to the ratio of step 25), forming the daily power generation plan value of each power station, and enter step 30), each power station The formula for calculating the planned value of daily power generation is: WR _{k plan} = _{total WR plan} * RAT _k Wherein, the WR _{k plan} is the daily power generation plan value of the kth power station, and the WR _{plan is always} the daily total power generation plan value stored in FLASH in the step 23); 27) According to the monthly power generation statistical area data in the FLASH area of each power station, the monthly power generation of the power station is estimated and counted, and the formula is: Among them, wM _{k is estimated} as the estimated monthly power generation of the kth power station, and wM _ki is the monthly power generation statistics of the kth power station in the i-th month; 28) Calculate the monthly power distribution ratio of each power station, the formula is: Among them, MAT _k is the monthly power distribution ratio of the k-th power station, wM _{i is estimated} to be the estimated monthly power generation of the i-th power station, and m is the number of all power stations connected to the control device; 29) Distribute the monthly total power generation plan value stored in the FLASH area in step 23) to each power station according to the ratio of step 28), forming the monthly power generation plan value of each power station, and enter step 30), each power station The formula for calculating the planned value of daily power generation is: WM _{k plan} = _{total WM plan} * MAT _k Wherein, the WM _{k plan} is the monthly power generation plan value of the kth power station, and the WM _{plan is always} the monthly total power generation plan value stored in FLASH in step 23); 30) Send the planned value of daily power generation or monthly power generation to each new energy line interface device through the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in; The described stabilizing control of access to the new energy power station includes the following steps: 31) The intelligent management and control device configures the power quality parameters through the liquid crystal, pre-configures the centralized reactive power compensation control strategy in the FLASH area of the control MCP plug-in, and sets the power quality control flag = 0; 32) Acquisition of AC plug-in for analog acquisition of bus voltage, incoming current, and current of all incoming and outgoing lines; 33) The acquisition AC plug-in calculates the voltage, the 25th harmonic content rate of the incoming line current, and the 25th harmonic content rate of all outgoing line currents based on the collected bus voltage, incoming line current, and connected outgoing line current, and calculates the total Active power, total reactive power, total power factor and active power, reactive power, power factor of all outgoing lines; 34) Collect the AC plug-in and transmit the calculation result of step 33) to the control MCP plug-in through the CAN bus; 35) Control the MCP plug-in to detect the voltage amplitude, voltage harmonic content rate, total incoming line current harmonic content rate and total power factor in real time, and judge the incoming line power quality index. If it is unqualified, go to step 36); otherwise, return to step 32 ); 36) If the power quality control flag=0, go to step 37); if the power quality control flag=1, go to step 39); 37) According to the centralized reactive power compensation control strategy configured in step 31), automatic switching of the centralized reactive power compensation device; 38) After the automatic switching control of the centralized reactive power compensation is completed, the power quality control flag = 1 is set after a delay of 5 minutes; return to step 32); 39) The control MCP plug-in sorts all outgoing lines with unqualified power quality according to the harmonic content of the outgoing current from large to small, and controls the unqualified power quality of the line in step 31) for the outgoing line with the largest current harmonic content The configuration of the parameter is controlled, if the parameter is an alarm and enters step 40), if it is a trip, enters step 41); 40) Send an alarm to the new energy grid-connected interface device through the optical fiber OTH plug-in, serial port COM plug-in or wireless WX plug-in, and send an alarm command to the upper-level deployment center through the host computer module. After a delay of 5 minutes, return to step 32); 41) Jump off the circuit breaker of the new energy line, and send an alarm command to the superior allocation center through the upper computer module through the remote signal of the position of the circuit breaker and the reason; after a delay of 5 minutes, return to step 32); The energy optimization control includes the following steps: 51) The upper computer module that controls the MCP plug-in receives the electricity price peak, peak time period, valley time period and peace time period information of the upper computer in real time; 52) The AC plug-in collects the analog quantity of the incoming line, and calculates the active power, reactive power and power factor of the incoming line in real time; 53) Calculate the energy storage control target at 0:00 every day, the formula is as follows; M _control = (WR _{plan total} - W _peak - W _peak - W _valley - W _flat ) * 60/(24*60 - T _peak - T _peak - T _valley ) Among them, M _control is the control target of centralized energy storage, WR _{plan is the total} daily power generation plan value, W _peak is the total power generation statistics data of the peak period of the previous day in the region, W _peak is the total power generation statistics data of the peak period of the previous day in the region, W _Valley is the total power generation statistics of the valley period of the previous day in the region, W _level is the total power generation statistics of the previous day’s flat time period in the region, T _peak is the peak time period (unit: minute), T _peak is the peak time period ( Unit: minute), T _valley is the time period of the valley (unit: minute); 54) During the peak and peak time periods, control the discharge of the centralized energy storage, send the maximum power generation plan command to the interface device of the new energy power station, and calculate, count and save the peak value of the day in real time according to the collected and calculated values in step 52) The total power generation in the time period W _peak, the total power generation in the peak time period W _peak ; 55) During the off-peak time period, perform charging control on the centralized energy storage, send the minimum power generation plan command to the interface device of the new energy power station, and calculate, count and save the off-peak time period of the day in real time according to the collected and calculated values in step 52) Total power generation W _Valley ; 56) In the normal time period, control the centralized energy storage according to the energy storage control target. If M _control >0, perform discharge control, and if M _control <0, perform charge control; and according to the collected and calculated values in step 52), real-time Calculate, count and save the total power generation W _level of the average time period of the day; 57) During the normal time period, the AC plug-in collects the current and voltage of the centralized energy storage line in real time, and _calculates the power generation value M of the energy storage line; 58) In the normal time period, the energy storage control target is corrected according to the error between the real-time calculated M _control and the M _calculation , and the calculation formula is: M' _control = M _control + (M _control - M _calculation ) Among them, M'control is the actual power generation _control target of centralized energy storage; 59) In the normal time period, use the M' _control target to control the centralized energy storage, that is, M _control = M' _control , and then return to step 56) to achieve the target of closed-loop real-time error correction. 2. A method for intelligent management and control of an intelligent management and control device in a centralized area of a new energy power station according to claim 1, wherein the optical fiber OTH plug-in includes eight optical fiber Ethernet ports. 3. A method for intelligent management and control of an intelligent management and control device in a centralized area of a new energy power station according to claim 1, wherein the serial port COM plug-in includes 16 RS485 communication ports. 4. A method for intelligent management and control of an intelligent management and control device in a centralized area of a new energy power station according to claim 1, wherein the wireless WX plug-in includes 433M local area wireless communication and GPRS communication. 5. The method for intelligent management and control of intelligent management and control devices in a centralized area of a new energy power station according to claim 1, characterized in that, in the step 12), the communication parameter configuration includes protocol selection and parameter configuration, and the protocol selection includes IEC61850 protocol, 101 protocol, 104 protocol, modbus protocol, self-defined protocol; the parameter configuration includes interface mode and communication setting, the interface mode includes Ethernet, serial port, local area wireless and GPRS mode, and the selection of different interface modes will automatically The communication setting menu of this mode will pop up. 6. A method for intelligent management and control of intelligent management and control devices in centralized areas of new energy power stations according to claim 1, characterized in that, in step 13), the power station information includes telemetry information, remote signaling information, and new energy power generation information of the power station. Power consumption, load power, power station operating status, fault alarm operation information. 7. A method for intelligent management and control of intelligent management and control devices in centralized areas of new energy power stations according to claim 1, characterized in that, in the step 31), the power quality parameters include a voltage threshold and a voltage threshold , threshold value of harmonic content rate, threshold value of qualified power factor and unqualified power quality control parameters for all outgoing lines, among which, unqualified power quality control parameters include alarm and trip. 8. The method for intelligent management and control of a new energy power station centralized area intelligent management and control device according to claim 1 or 7, characterized in that, in the step 35), the criterion for judging the unqualified power quality of the incoming line is the voltage amplitude higher than the overvoltage threshold set in step 31), or the voltage amplitude is lower than the undervoltage threshold set in step 31), or the voltage harmonic content exceeds the harmonic content threshold, Or the incoming line current harmonic content rate exceeds the harmonic content rate threshold, or the total power factor is lower than the power factor qualified threshold, then it is judged that the incoming line power quality is unqualified. 9. The method for intelligent management and control of a new energy power station centralized area intelligent management and control device according to claim 1, characterized in that, in the step 39), the criterion for judging that the power quality of the outgoing line is unqualified is the harmonic content of the outgoing line current If the harmonic content ratio threshold is exceeded or the power factor is lower than the power factor qualified threshold, it is judged that the outgoing line is a line with unqualified power quality.