CN111049154A - Emergency power supply networking reactive voltage coordination control method and related device - Google Patents
Emergency power supply networking reactive voltage coordination control method and related device Download PDFInfo
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- CN111049154A CN111049154A CN201911194939.5A CN201911194939A CN111049154A CN 111049154 A CN111049154 A CN 111049154A CN 201911194939 A CN201911194939 A CN 201911194939A CN 111049154 A CN111049154 A CN 111049154A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/30—Reactive power compensation
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Abstract
The application discloses a reactive voltage coordination control method and a related device for emergency power supply networking, which adopts reactive voltage difference adjustment control to the voltage reactive primary control, samples the actual voltage information of the emergency power supply by the secondary control, introduces a feedback link in the control strategy, takes the actual voltage of the emergency power supply as the control variable of a secondary control function, secondarily adjusts the voltage reactive of the emergency power supply, realizes the output voltage adjustment of a plurality of emergency power supplies under the condition of setting the same secondary voltage control gain coefficient and voltage reactive difference adjustment coefficient, greatly reduces the slope of the output voltage and the output power, greatly reduces the voltage level of the emergency power supply along with the reactive fluctuation range of the load, maintains the operation near the rated voltage, and a plurality of emergency power supplies in the networking can bear the switching reactive load impact of a microgrid together, the stability is greatly improved, the flexible networking of emergency power supplies of different manufacturers and different models can be realized, and the networking scale is not limited.
Description
Technical Field
The application relates to the technical field of reactive power control of power grids, in particular to a configuration method of an energy storage device of a low-voltage distribution network and a related device.
Background
Natural disasters such as ice disasters, snow disasters and typhoons often cause large-area and long-time power failure events, and in order to reduce economic loss caused by power supply interruption, emergency power protection measures when a local power grid collapses due to disasters are necessary to study the fact that the proportion of power grid accidents caused by natural disasters to total power grid accidents is increased year by year.
At present, the power failure problem caused by natural disasters is avoided by adopting an emergency power supply networking mode, as shown in fig. 1, the existing emergency power supply centralized networking mode adopts a centralized control idea, a plurality of emergency power supplies are connected through a CAN bus, one emergency power supply is selected as a centralized controller, an AVC voltage secondary control function is simulated, the voltage level of the microgrid is controlled and constructed, and other emergency power supplies are connected with reactive power instructions of the centralized controller and operate in a constant reactive power control mode. However, in the centralized control voltage reactive secondary control method, in the disturbance process of the load switching of the power grid, only one emergency power supply for controlling the voltage level of the micro-grid bears the reactive load disturbance of the micro-grid, so that the stable operation risk is high, and the instability of the micro-grid can be caused in the process of switching a large reactive load; meanwhile, the centralized control voltage reactive secondary control method requires that emergency power supplies of the same manufacturer and the same model can be interconnected, and the networking flexibility and the networking scale of the emergency power supplies are limited.
Disclosure of Invention
The application provides an emergency power supply networking reactive voltage coordination control method and a related device, which are used for solving the technical problems that the existing centralized control voltage reactive secondary control method has higher risk of stable operation of a microgrid and the networking flexibility and networking scale of the emergency power supply are limited.
In view of this, a first aspect of the present application provides an emergency power supply networking reactive voltage coordination control method, including:
acquiring the actual output voltage of an emergency power supply connected with the excitation regulator, and taking the actual output voltage of the emergency power supply as a control variable of the voltage reactive secondary control function;
configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator, and superposing the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator;
adjusting a secondary voltage control gain coefficient and a voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient;
wherein the voltage reactive primary control function is as follows: vpri(Qi)＝Vmax-diQiThe voltage reactive quadratic control function is as follows: vsec(Qi)＝β(V0-Vi)，VmaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating，diFor reactive voltage adjustment coefficient, ViFor the actual output voltage of the emergency power supply, β is the secondary voltage control gain factor.
Optionally, the configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator, and superimposing the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator specifically includes:
configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator;
performing low-pass filtering on the voltage reactive secondary control function;
and superposing the voltage reactive primary control function and the voltage reactive secondary control function after low-pass filtering to be used as an input target control function of the excitation regulator.
Optionally, the transfer function of the low-pass filtering is:
wherein, T1Is a time constant.
This application second aspect provides an emergency power source network deployment reactive voltage coordinated control device, includes:
the acquisition module is used for acquiring the actual output voltage of the emergency power supply connected with the excitation regulator and taking the actual output voltage of the emergency power supply as a control variable of the voltage reactive secondary control function;
a configuration module, configured to configure a voltage reactive primary control function and the voltage reactive secondary control function of the excitation regulator, and superimpose the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator, where the voltage reactive primary control function is: vpri(Qi)＝Vmax-diQiThe voltage reactive quadratic control function is as follows: vsec(Qi)＝β(V0-Vi)，VmaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating, diFor reactive voltage adjustment coefficient, Viβ is the actual output voltage of the emergency power supply, and is the secondary voltage control gain coefficient;
and the control module is used for adjusting a secondary voltage control gain coefficient and a voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient.
Optionally, the configuration module specifically includes:
the function configuration module is used for configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator;
the filtering module is used for carrying out low-pass filtering on the voltage reactive secondary control function;
and the superposition module is used for superposing the voltage reactive primary control function and the voltage reactive secondary control function after low-pass filtering to be used as an input target control function of the excitation regulator.
The third aspect of the present application provides an emergency power supply networking reactive voltage coordination control system, including: the device comprises a primary voltage reactive controller, a secondary voltage reactive controller, a superimposer, an excitation regulator and an emergency power supply;
the primary voltage reactive controller is used for outputting a voltage reactive primary control function, and the voltage reactive primary control function is Vpri(Qi)βVmax-diQi，VmaxUpper voltage limit of the microgrid, QiReactive power output for emergency power source i, diThe voltage reactive difference adjustment coefficient is obtained;
the secondary voltage reactive power controller is used for outputting a voltage reactive secondary control function, and the voltage reactive secondary control function is as follows: vsec(Qi)＝β(V0-Vi)，QiReactive power, V, output for emergency power source i0To a voltage rating, Viβ is the actual output voltage of the emergency power supply, and is the secondary voltage control gain coefficient;
the superimposer is used for superimposing the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator;
the excitation regulator is used for obtaining the actual output voltage of an emergency power supply connected with the excitation regulator, taking the actual output voltage of the emergency power supply as a control variable of the voltage reactive secondary control function, regulating the secondary voltage control gain coefficient and the voltage reactive difference regulating coefficient to be the same coefficient, and controlling the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive difference regulating coefficient are regulated to be the same coefficient.
The present application provides a low-voltage distribution network energy storage device configuration apparatus, which includes a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing any one of the emergency power supply networking reactive voltage coordination control methods according to the instructions in the program codes.
A fifth aspect of the present application provides a computer-readable storage medium for storing program codes, where the program codes are used to execute any one of the emergency power networking reactive voltage coordination control methods described in the first aspect.
A sixth aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform any one of the methods for emergency power networking reactive voltage coordination control of the first aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a reactive voltage coordination control method for emergency power supply networking, which comprises the following steps: acquiring the actual output voltage of an emergency power supply connected with the excitation regulator, and taking the actual output voltage of the emergency power supply as a control variable of the voltage reactive secondary control function; configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator, and overlapping the voltage reactive primary control function and the voltage reactive secondary control function to be used as an input target control function of the excitation regulator; adjusting the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient; wherein, the voltage reactive primary control function is as follows: vpri(Qi)βVmax-diQiThe voltage reactive quadratic control function is: vsec(Qi)＝β(V0-Vi)，VmaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating, diFor reactive voltage adjustment coefficient, ViFor the actual output voltage of the emergency power supply, β is the secondary voltage control gain factor.
The reactive voltage coordination control method for the emergency power supply networking is based on the idea of layered control, reactive voltage difference adjustment control is adopted for primary voltage reactive control, secondary control samples actual voltage information of the emergency power supply, a feedback link is introduced into a control strategy, the actual voltage of the emergency power supply is used as a control variable of a secondary control function, secondary regulation is carried out on the voltage reactive power of the emergency power supply, under the condition that the same secondary voltage control gain coefficient and voltage reactive difference adjustment coefficient are set, the secondary control realizes the output voltage regulation of a plurality of emergency power supplies, so that the slope of the output voltage and the output power is greatly reduced, the voltage level of the emergency power supply is greatly reduced along with the reactive fluctuation range of load, the operation is maintained near the rated voltage, and a plurality of emergency power supplies of the networking can participate in voltage reactive control together, the method bears the switching reactive load impact of the microgrid together, greatly improves the stability, can realize flexible networking of emergency power supplies of different manufacturers and different models, is not limited in the networking scale, and solves the technical problems that the microgrid has larger stable operation risk and the networking flexibility and the networking scale of the emergency power supplies are limited in the conventional centralized control voltage reactive secondary control method.
Drawings
Fig. 1 is a schematic diagram of a conventional centralized networking manner of an emergency power supply;
FIG. 2 is a graph of a voltage primary control relationship;
FIG. 3 is a diagram of an RTDS simulation model in an embodiment of the present application;
FIG. 4 is a schematic diagram of voltage levels of nodes under voltage reactive primary control of the RTDS simulation model of FIG. 3;
fig. 5 is a schematic diagram of voltage levels of nodes under the control of the reactive voltage coordination control method for the emergency power supply networking in the embodiment of the present application on the RTDS simulation model of fig. 3;
FIG. 6 is a graph of a dynamic process of the load switch L4 input in a voltage reactive primary control mode for the RTDS simulation model of FIG. 3;
fig. 7 is a dynamic process curve diagram of the input load switch L4 under the control of the reactive voltage coordination control method for the emergency power supply networking in the embodiment of the present application on the RTDS simulation model of fig. 3;
fig. 8 is a schematic flowchart of a reactive voltage coordination control method for an emergency power supply networking provided in an embodiment of the present application;
fig. 9 is a schematic structural diagram of an emergency power supply networking reactive voltage coordination control device provided in an embodiment of the present application;
fig. 10 is a schematic structural diagram of an emergency power supply networking reactive voltage coordination control system provided in an embodiment of the present application;
fig. 11 is a schematic diagram of the internal control process of two controllers in the structural diagram of fig. 10.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For convenience of understanding, please refer to fig. 1 to 8, an embodiment of a method for coordinating and controlling reactive voltage of an emergency power supply networking provided by the present application includes:
It should be noted that in the embodiment of the present application, the actual output voltage of the emergency power supply may be sampled by the excitation regulator, a feedback link is introduced into the control strategy, and the actual output voltage of the emergency power supply is used as the control variable V of the voltage reactive secondary control functioni。
And 102, configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator, and overlapping the voltage reactive primary control function and the voltage reactive secondary control function to be used as an input target control function of the excitation regulator.
It should be noted that the voltage reactive primary control function and the voltage reactive secondary control function configured in the embodiment of the present application are respectively: vpri(Qi)βVmax-diQiAnd Vsec(Qi)＝β(V0-Vi) Wherein V ismaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating, diFor reactive voltage adjustment coefficient, ViFor the actual output voltage of the emergency power supply, β is the secondary voltage control gain factor, since the excitation regulator of the emergency power supply is zeroDifference parallel PI control mode, therefore, the actual voltage V of the emergency generator car under the steady state conditioniAnd target frequency V of emergency power generation vehicleirefConsistently, consider that: viref＝Vi。
The voltage reactive primary control function and the voltage reactive secondary control function are superposed to be used as an input target control function of the excitation regulator, namely
Viref＝Vpri(Qi)+Vsec(Qi)。
And 103, adjusting the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient.
Note that the same control coefficient d is setiAnd β, secondary control realizes secondary adjustment of output voltage of multiple emergency power generation cars, so that the slope of the output voltage and the output reactive power is greatly reduced, the voltage level of the emergency power generation cars is greatly reduced along with the reactive fluctuation range of the load, and the emergency power generation cars are maintained to operate near the rated voltage.
The method for coordinated control of reactive voltage of emergency power supply networking provided by the embodiment of the application is based on the idea of layered control, reactive voltage difference adjustment control is adopted for primary voltage reactive control, secondary control samples actual voltage information of the emergency power supply, a feedback link is introduced into a control strategy, the actual voltage of the emergency power supply is taken as a control variable of a secondary control function, secondary regulation is carried out on the voltage reactive power of the emergency power supply, under the condition that the same secondary voltage control gain coefficient and the same voltage reactive difference adjustment coefficient are set, the secondary control realizes the output voltage regulation of a plurality of emergency power supplies, so that the slope of the output voltage and the output power is greatly reduced, the voltage level of the emergency power supply is greatly reduced along with the reactive fluctuation range of load, the emergency power supplies are maintained to operate near the rated voltage, and the plurality of emergency power supplies in the networking can participate in voltage reactive power microgrid control together, the method bears the switching reactive load impact of the microgrid together, greatly improves the stability, can realize flexible networking of emergency power supplies of different manufacturers and different models, is not limited in the networking scale, and solves the technical problems that the microgrid has larger stable operation risk and the networking flexibility and the networking scale of the emergency power supplies are limited in the conventional centralized control voltage reactive secondary control method.
As a further improvement of the embodiment of the present application, in the embodiment of the present application, low-pass filtering may be performed on the voltage reactive quadratic control function.
The transfer function of the low-pass filtered filter is:
the design of low-pass filtering in secondary control can realize dynamic decoupling with primary control, weaken internal relation between the primary control and the secondary control, and avoid the problem of system stability possibly caused by simultaneous action of the primary control and the secondary control.
Thus, there are:
Vsec(Qi)＝β(V0-Vi)
Viref＝Vpri(Qi)+Vsec(Qi)
wherein, VirefGiven value of target voltage, ViFor the actual output voltage of the emergency power generation vehicle, β is a secondary voltage control gain coefficient.
Because the excitation regulator of the emergency power supply is in a non-difference parallel PI control mode, the actual voltage V of the emergency power generation vehicle under the steady state conditioniAnd target frequency V of emergency power generation vehicleirefConsistently, consider that: viref＝Vi。
The first and second voltage-reactive variations are determined by a time constant T1The low-pass filters are added to obtain a final voltage reference value Viref：
Viref＝Vpri(Qi)+Vsec(Qi)/(1+T1s)；
Substituting the above equation yields:
in setting the same control coefficient diAnd β, secondary control realizes secondary adjustment of output voltage of multiple emergency power generation cars, so that the slope of the output voltage and the output reactive power is greatly reduced, the voltage level of the emergency power generation cars is greatly reduced along with the reactive fluctuation range of the load, and the emergency power generation cars are maintained to operate near the rated voltage.
The excitation regulator is provided with a control mode of a difference adjusting coefficient, which is equivalent to primary voltage reactive control, the difference adjusting coefficient is arranged in the excitation regulator, so that the voltage and reactive power of the emergency power generation vehicle are adjusted in a difference mode, the difference adjusting coefficient is generally set to be 8%, the relation between the emergency power generation difference output voltage V and the output reactive power Q is shown in figure 2, along with the increase of the output reactive power Q of the emergency power generation vehicle, the voltage of the emergency power generation vehicle is gradually reduced, the voltage level of a user is reduced, and the electric energy quality is poor.
The effect achieved by the method of the embodiment of the present application is described below with reference to a specific simulation case.
A simulation model shown in fig. 3 is built in RTDS, G1 and G2 are generator sets, RL1-RL6 are simulation line impedances, the impedance values are equivalent to 400V line impedance values of 300 meters, L1-L5 are load switching switches, different active and reactive load loads are simulated to be switched, and K1 is a two-machine combined ring networking switch. Wherein the load is set as follows:
the load switch L1 corresponds to an active load of 0.2MW and a reactive load of 0.1 Mvar;
the load switch L2 corresponds to an active load of 0.2MW and a reactive load of 0.1 Mvar;
the load switch L3 corresponds to an active load of 0.1MW and a reactive load of 0.0001 Mvar;
the load switch L4 corresponds to an active load of 0.2MW and a reactive load of 0.5 Mvar;
the load switch L5 corresponds to an active load of 0.3MW and a reactive load of 0.1 Mvar.
All load switches L1-L5 are put into use, the loop closing network K1 is closed, and when voltage reactive power primary control is adopted, the simulation calculation result of the voltage level steady-state value of each node is shown in figure 4.
After the reactive voltage coordination control method for the emergency power supply networking is adopted, the simulation calculation result of the voltage level steady-state value of each node is shown in fig. 5.
Comparing fig. 5 and fig. 4, it is obvious that the voltage level of the load can be significantly improved by using the voltage reactive secondary control method of the present invention.
Fig. 6 shows the result of the dynamic simulation of the input load switch L4 in the voltage reactive primary control mode. It can be seen that the voltage level of the emergency power generation vehicle is obviously reduced along with the increase of the reactive load, and the output voltage of the emergency power generation vehicle is reduced from 396V to 383V.
In the reactive voltage coordination control method according to the embodiment of the present application, a dynamic simulation result of the input load switch L4 is shown in fig. 7. Therefore, the voltage level of the emergency power generation vehicle does not change obviously along with the increase of the reactive load, the output voltage of the emergency power generation vehicle is changed from 399V to 397V and is still maintained near the rated voltage, and the load voltage level is greatly improved.
Comparing fig. 6 and fig. 7, it can be found that, by using the reactive voltage coordination control method according to the embodiment of the present application, after the load switch L4 is also turned on, the output voltage level of the emergency power generation car is raised to 397V from 383V in a primary control manner, the voltage supporting strength for the microgrid is greatly improved, and when the reactive load is switched in the microgrid formed, the output voltage level of the emergency power generation car can be maintained and is not greatly influenced by the magnitude of the output reactive power thereof, and is always maintained near the rated value, and the voltage level of the microgrid is greatly raised.
Therefore, the method in the embodiment of the application solves the problems existing in a single primary control mode and a centralized control mode, avoids the problem of poor electric energy quality caused by primary reactive voltage control, can realize secondary reactive voltage control without a central controller and a communication system, can realize flexible networking of emergency power supplies of different manufacturers and different signals, is not limited in networking scale, and ensures that a plurality of emergency power supplies of the networking participate in reactive voltage control of the microgrid together to bear switching reactive load impact of the microgrid together, thereby greatly improving the stability.
For easy understanding, please refer to fig. 9, the present application provides an embodiment of an emergency power networking reactive voltage coordination control apparatus, including:
and the acquisition module is used for acquiring the actual output voltage of the emergency power supply connected with the excitation regulator and taking the actual output voltage of the emergency power supply as the control variable of the voltage reactive secondary control function.
The configuration module is used for configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator, superposing the voltage reactive primary control function and the voltage reactive secondary control function and using the superposed functions as an input target control function of the excitation regulator, wherein the voltage reactive primary control function is as follows: vpri(Qi)＝Vmax-diQiThe voltage reactive quadratic control function is: vsec(Qi)＝β(V0-Vi)，VmaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating, diFor reactive voltage adjustment coefficient, ViFor the actual output voltage of the emergency power supply, β is the secondary voltage control gain factor.
And the control module is used for adjusting the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient.
Further, the configuration module specifically includes:
and the function configuration module is used for configuring the voltage reactive primary control function and the voltage reactive secondary control function of the excitation regulator.
And the filtering module is used for carrying out low-pass filtering on the voltage reactive secondary control function.
And the superposition module is used for superposing the voltage reactive primary control function and the low-pass filtered voltage reactive secondary control function to be used as an input target control function of the excitation regulator.
For ease of understanding, please refer to fig. 10 and 11, an embodiment of an emergency power supply networking reactive voltage coordination control system is provided in the present application, including: the device comprises a primary voltage reactive controller, a secondary voltage reactive controller, a superimposer, an excitation regulator and an emergency power supply;
the primary voltage reactive controller is used for outputting a voltage reactive primary control function, and the voltage reactive primary control function is Vpri(Qi)＝Vmax-diQi，VmaxUpper voltage limit of the microgrid, QiReactive power output for emergency power source i, diThe voltage reactive difference adjustment coefficient is obtained;
the secondary voltage reactive power controller is used for outputting a voltage reactive secondary control function, and the voltage reactive secondary control function is as follows: vsec(Qi)＝β(V0-Vi)，QiReactive power, V, output for emergency power source i0To a voltage rating, Viβ is the actual output voltage of the emergency power supply, and is the secondary voltage control gain coefficient;
the superimposer is used for superimposing a voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator;
the excitation regulator is used for acquiring the actual output voltage of the emergency power supply connected with the excitation regulator, taking the actual output voltage of the emergency power supply as a control variable of a voltage reactive secondary control function, regulating a secondary voltage control gain coefficient and a voltage reactive difference regulating coefficient to be the same coefficient, and controlling the reactive voltage of the emergency power supply according to an input target control function after the secondary voltage control gain coefficient and the voltage reactive difference regulating coefficient are regulated to be the same coefficient.
Further, the secondary voltage reactive controller is also used for low-pass filtering the voltage reactive secondary control function.
The application also provides an embodiment of the reactive voltage coordination control equipment for the emergency power supply networking, and the equipment comprises a processor and a memory:
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is used for executing any one of the emergency power supply networking reactive voltage coordination control method embodiments according to the instructions in the program code.
Also provided in this application is an embodiment of a computer-readable storage medium for storing program code for executing any one of the foregoing emergency power networking reactive voltage coordination control method embodiments.
Also provided herein are embodiments of a computer program product comprising instructions that, when run on a computer, cause the computer to perform performing any of the foregoing emergency power networking reactive voltage coordination control method embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A reactive voltage coordination control method for an emergency power supply networking is characterized by comprising the following steps:
acquiring the actual output voltage of an emergency power supply connected with an excitation regulator, and taking the actual output voltage of the emergency power supply as a control variable of a voltage reactive secondary control function;
configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator, and superposing the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator;
adjusting a secondary voltage control gain coefficient and a voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient;
wherein the voltage reactive primary control function is as follows: vpri(Qi)＝Vmax-diQiThe voltage reactive quadratic control function is as follows: vsec(Qi)＝β(V0-Vi)，VmaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating, diFor reactive voltage adjustment coefficient, ViFor the actual output voltage of the emergency power supply, β is the secondary voltage control gain factor.
2. The method for coordinated control of reactive voltage of emergency power supply networking according to claim 1, wherein the configuring of the voltage reactive primary control function and the voltage reactive secondary control function of the excitation regulator, and the superimposing of the voltage reactive primary control function and the voltage reactive secondary control function as the input target control function of the excitation regulator, specifically comprises:
configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator;
performing low-pass filtering on the voltage reactive secondary control function;
and superposing the voltage reactive primary control function and the voltage reactive secondary control function after low-pass filtering to be used as an input target control function of the excitation regulator.
3. The method for coordinated control of reactive voltage of emergency power supply networking according to claim 2, wherein the transfer function of the low-pass filtering is as follows:
wherein, T1Is a time constant.
4. The utility model provides an emergency power supply network deployment reactive voltage coordinated control device which characterized in that includes:
the acquisition module is used for acquiring the actual output voltage of the emergency power supply connected with the excitation regulator and taking the actual output voltage of the emergency power supply as a control variable of the voltage reactive secondary control function;
a configuration module, configured to configure a voltage reactive primary control function and the voltage reactive secondary control function of the excitation regulator, and superimpose the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator, where the voltage reactive primary control function is: vpri(Qi)＝Vmax-diQiThe voltage reactive quadratic control function is as follows: vsec(Qi)＝β(V0-Vi)，VmaxUpper voltage limit of the microgrid, QiReactive power, V, output for emergency power source i0To a voltage rating, diFor reactive voltage adjustment coefficient, Viβ is the actual output voltage of the emergency power supply, and is the secondary voltage control gain coefficient;
and the control module is used for adjusting a secondary voltage control gain coefficient and a voltage reactive power difference adjustment coefficient of the input target control function to be the same coefficient, so that the excitation regulator controls the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive power difference adjustment coefficient are adjusted to be the same coefficient.
5. The reactive voltage coordination control device for emergency power supply networking according to claim 3, wherein the configuration module specifically comprises:
the function configuration module is used for configuring a voltage reactive primary control function and a voltage reactive secondary control function of the excitation regulator;
the filtering module is used for carrying out low-pass filtering on the voltage reactive secondary control function;
and the superposition module is used for superposing the voltage reactive primary control function and the voltage reactive secondary control function after low-pass filtering to be used as an input target control function of the excitation regulator.
6. The utility model provides an emergency power supply network deployment reactive voltage coordinated control system which characterized in that includes: the device comprises a primary voltage reactive controller, a secondary voltage reactive controller, a superimposer, an excitation regulator and an emergency power supply;
the primary voltage reactive controller is used for outputting a voltage reactive primary control function, and the voltage reactive primary control function is Vpri(Qi)＝Vmax-diQi，VmaxUpper voltage limit of the microgrid, QiReactive power output for emergency power source i, diThe voltage reactive difference adjustment coefficient is obtained;
the secondary voltage reactive power controller is used for outputting a voltage reactive secondary control function, and the voltage reactive secondary control function is as follows: vsec(Qi)＝β(V0-Vi)，QiReactive power, V, output for emergency power source i0To a voltage rating, ViFor the actual output voltage of the emergency power supply, β is the secondary voltage control gain factor；
The superimposer is used for superimposing the voltage reactive primary control function and the voltage reactive secondary control function as an input target control function of the excitation regulator;
the excitation regulator is used for obtaining the actual output voltage of an emergency power supply connected with the excitation regulator, taking the actual output voltage of the emergency power supply as a control variable of the voltage reactive secondary control function, regulating the secondary voltage control gain coefficient and the voltage reactive difference regulating coefficient to be the same coefficient, and controlling the reactive voltage of the emergency power supply according to the input target control function after the secondary voltage control gain coefficient and the voltage reactive difference regulating coefficient are regulated to be the same coefficient.
7. The emergency power networking reactive voltage coordination control system of claim 5, wherein the secondary voltage reactive controller is further configured to low pass filter the voltage reactive secondary control function.
8. The utility model provides an emergency power supply network deployment reactive voltage coordinated control equipment which characterized in that, equipment includes treater and memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the method for coordinating and controlling the reactive voltage of the emergency power supply networking according to any one of claims 1-3 according to instructions in the program code.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium is used for storing program codes for executing the emergency power supply networking reactive voltage coordination control method according to any one of claims 1 to 3.
10. A computer program product comprising instructions that, when run on a computer, cause the computer to perform the emergency power networking reactive voltage coordination control method of any of claims 1-3.
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