CN110912152A - Method and system for determining maximum ratio of new energy of power system - Google Patents
Method and system for determining maximum ratio of new energy of power system Download PDFInfo
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- CN110912152A CN110912152A CN201910973713.9A CN201910973713A CN110912152A CN 110912152 A CN110912152 A CN 110912152A CN 201910973713 A CN201910973713 A CN 201910973713A CN 110912152 A CN110912152 A CN 110912152A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
Abstract
The invention discloses a method and a system for determining the maximum ratio of new energy of an electric power system, and belongs to the technical field of operation control of the electric power system. The method comprises the following steps: establishing a single machine system model according to the new energy power system; determining a relational expression of the injection power of the new energy generator single machine model to the bus, the injection electromagnetic power of the synchronous generator single machine model to the bus, the load absorption electromagnetic power of the power system and the new energy ratio; determining unbalanced power which can be balanced by a single-machine model of the new energy generator; adjusting power of balanced and unbalanced power required to be provided by a synchronous generator single machine model according to the determined power; and determining the new energy ratio of the energy power system. The method can simplify the analysis and calculation difficulty while ensuring the accuracy of the calculation result, has higher engineering applicability, and can effectively ensure the safe and stable operation of the power grid.
Description
Technical Field
The present invention relates to the field of power system operation control technology, and more particularly, to a method and system for determining a maximum ratio of new energy in a power system.
Background
The energy crisis makes people pay more and more attention to research and utilization of new energy, and new energy power generation is a main way of utilizing new energy. The new energy generator set is different from the traditional synchronous generator set, and due to the addition of a converter control link, electromechanical decoupling is realized, and the stability characteristic of the new energy generator set is changed. The new energy power generation proportion of China is gradually increasing and will continue to increase. After the large-scale new energy power generation replaces the traditional synchronous machine set to generate power, the frequency stability characteristic of a power system can be changed. After the power generation proportion of the new energy is improved, the transient supporting capability of the system to the frequency is weakened, the steady-state adjusting capability is reduced, and the essential reason is that the frequency stability problem is prominent because the inertia level and the frequency modulation capacity of the power grid are relatively reduced. With the continuous improvement of the proportion of new energy, the system needs the new energy to have certain frequency modulation capability. In response to the demand, manufacturers of new energy units have been producing new energy units with certain frequency modulation capability. When the research considers that the new energy has the frequency regulation capacity, the system has important engineering and practical significance for ensuring the stable steady-state frequency of the power system and ensuring the maximum new energy ratio which can be absorbed by the system.
The power system is a typical high-order nonlinear system, and after a detailed mathematical model of each model is established, a full-state time domain simulation method can be used for carrying out numerical solution, so that the frequency dynamic response characteristic of the system can be comprehensively obtained. However, the full-state time domain simulation method has a large calculation amount and is generally only suitable for offline analysis. The existing method realizes the rapid calculation of the steady-state frequency of the power system after disturbance, but the existing method does not consider the influence of the access of new energy power generation on the calculation of the steady-state frequency, does not consider the influence of the new energy participating in the frequency modulation of the system on the calculation of the steady-state frequency, and does not consider the upper limit problem of the maximum acceptable proportion of the new energy of the system when the new energy participates in the frequency modulation. The practical problems that the new energy power generation proportion is more and the frequency is stable and more prominent in China cannot be solved.
Disclosure of Invention
In view of the above problem, the present invention provides a method for determining a maximum ratio of new energy in an electric power system, including:
establishing a new energy generator single machine model and a synchronous generator single machine model according to the new energy power system;
determining injection power P of single-machine model of new energy generator to busrInjecting electromagnetic power P into bus by single-machine model of synchronous generatorsThe load of the power system absorbs the electromagnetic power PLAnd determining PL、PrAnd PsA relation with a new energy ratio k;
when the bus is injected with electromagnetic power in real time balance and in steady state, P is determineds+Pr＝PL；
When the load absorbs the electromagnetic power with the variable quantity of delta P, the delta P is α PLThe maximum generated power of the new energy source capable of providing the compensation unbalanced power is β times, and the unbalanced power is α<Determining unbalanced power delta P of new energy single-machine model when 0 time is up1(ii) a Unbalanced power delta P when new energy single machine model is balanced1In case of not satisfying the unbalanced power to be compensated, according to Δ P1Determining the regulated power α P of the unbalanced-balanced power that needs to be provided by the synchronous generator stand-alone modelL-ΔP1＝(α+βk)PL；
According to regulated power α PL-ΔP1＝(α+βk)PLDetermining and changing the rotor rotating speed omega of a generator single-machine model of the synchronous machine, determining the frequency deviation after power fluctuation of the power system according to the rotor rotating speed omega, and determining the new energy ratio k of the energy power system according to the frequency deviation after power fluctuation of the power system.
Optionally, determining the frequency deviation after power fluctuation of the power system according to the rotor rotation speed ω, specifically:
when the mechanical power of the single machine model of the synchronous generator is adjusted, determining that the mechanical power change rate of the single machine model of the synchronous generator after the single machine system model has power fluctuation is as follows:
according to the mechanical power change rate of the single-machine model of the synchronous generator, the change rate of the rotating speed of the rotor is determined as follows:
Δω(％)＝-σΔPT(％)
wherein, sigma is the difference adjustment coefficient of the speed regulator of the single-machine model of the synchronous generator;
the rotor speed ω after the power fluctuation of the power system is:
determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega as follows:
optionally, PL、PrAnd PsAbsorbing electromagnetic power P by electric power system load according to a relation formula of new energy ratio k of new energy electric power systemLAs reference values, the relation is as follows:
Pr＝kPL
Ps＝(1-k)PL。
optionally, the value of the difference adjustment coefficient σ of the speed regulator of the single-machine model of the synchronous generator is between 0.04 and 0.05.
Optionally, determining the new energy ratio k of the energy power system specifically includes:
frequency deviation after determining power fluctuation of power system
When the absolute value of β is 9% -11%,
the invention also includes a system for determining a new energy maximum ratio for an electrical power system, the system comprising:
the synchronization module is used for establishing a new energy generator single machine model and a synchronous generator single machine model according to the new energy power system;
the first parameter acquisition module is used for determining the injection power P of the single-machine model of the new energy generator to the busrInjecting electromagnetic power P into bus by single-machine model of synchronous generatorsThe load of the power system absorbs the electromagnetic power PLAnd determining PL、PrAnd PsA relation with a new energy ratio k;
the second parameter acquisition module is used for determining P when the electromagnetic power injected into the bus is balanced in real time and is in a steady states+Pr＝PL；
When the load absorbs the electromagnetic power with the variable quantity of delta P, the delta P is α PLThe maximum generated power of the new energy source capable of providing the compensation unbalanced power is β times, and the unbalanced power is α<Determining unbalanced power delta P of new energy single-machine model when 0 time is up1(ii) a A third parameter obtaining module, for obtaining the unbalanced power delta P when the new energy single machine model is balanced1In case of not satisfying the unbalanced power to be compensated, according to Δ P1Determining the regulated power α P of the unbalanced-balanced power that needs to be provided by the synchronous generator stand-alone modelL-ΔP1＝(α+βk)PL；
A fourth parameter obtaining module for obtaining α P according to the regulated powerL-ΔP1＝(α+βk)PLDetermining and changing the rotor rotating speed omega of a generator single-machine model of the synchronous machine, determining the frequency deviation after power fluctuation of the power system according to the rotor rotating speed omega, and determining the new energy ratio k of the energy power system according to the frequency deviation after power fluctuation of the power system.
Optionally, determining the frequency deviation after power fluctuation of the power system according to the rotor rotation speed ω, specifically:
when the single machine model of the synchronous generator adjusts the mechanical power of the single machine system model, the change rate of the mechanical power of the single machine model of the synchronous generator after the power fluctuation of the single machine system model is determined as follows:
if the difference adjusting coefficient of the speed regulator of the single-machine model of the generator of the synchronous machine is sigma, the change rate of the rotating speed of the rotor is as follows:
Δω(％)＝-σΔPT(％)
the rotor speed ω after the power fluctuation of the power system is:
determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega as follows:
optionally, PL、PrAnd PsAbsorbing electromagnetic power P by electric power system load according to a relation formula of new energy ratio k of new energy electric power systemLAs reference values, the relation is as follows: pr＝kPL
Ps＝(1-k)PL。
Optionally, the value of the difference adjustment coefficient σ of the speed regulator of the single-machine model of the synchronous generator is between 0.04 and 0.05.
Optionally, determining the new energy ratio k of the energy power system specifically includes:
frequency deviation after determining power fluctuation of power system
When the absolute value of β is 9% -11%,
the invention provides a method for calculating the maximum new energy absorption ratio of a system, which considers that the steady-state frequency deviation amount is not out of limit under unbalanced power, of a power system after large-scale new energy power generation access with frequency modulation capability, and can be used for analyzing and running an actual power grid;
the method can simplify the analysis and calculation difficulty while ensuring the accuracy of the calculation result, has higher engineering applicability, and can effectively ensure the safe and stable operation of the power grid.
Drawings
FIG. 1 is a flow chart of a method for determining a maximum new energy ratio of an electrical power system according to the present invention;
FIG. 2 is a diagram of a single machine system model of a method for determining the maximum new energy ratio of an electric power system according to the present invention;
fig. 3 is a diagram of a system for determining a maximum new energy ratio of an electric power system according to the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides a method for determining a maximum ratio of new energy in an electric power system, as shown in fig. 1, comprising:
based on the concept of an inertia center, the synchronous generators in the researched system are aggregated into a single machine model, and a new energy single machine model is established according to a new energy electric power system, wherein the single machine system model is shown in fig. 2 and comprises the following steps: a new energy generator single machine model and a synchronous generator single machine model;
gr represents a new energy generator single machine model obtained by approximately aggregating all new energy power generation, and the new energy generator single machine model injects power P into the busrGs is a single-machine model of the synchronous generator, and the single-machine model of the synchronous generator injects electromagnetic power P into the buss；
Determining power system load absorbed electromagnetic power PLDetermining PL、PrAnd PsA relation with a new energy ratio k;
absorbing electromagnetic power P with electric power system loadLAs reference values, the relation is as follows:
Pr＝kPL
Ps＝(1-k)PL。
when the bus is injected with electromagnetic power in real time balance and in steady state, P is determineds+Pr＝PL；
When the load absorbs the electromagnetic power with the variable quantity of delta P, the delta P is α PLThe maximum generated power of the new energy source capable of providing the compensation unbalanced power is β times, and the unbalanced power is α<Determining unbalanced power delta P of new energy single-machine model when 0 time is up1；ΔP1＝-βkPL
Unbalanced power delta P when new energy single machine model is balanced1In case of not satisfying the unbalanced power to be compensated, according to Δ P1Determining the regulated power α P of the unbalanced-balanced power that needs to be provided by the synchronous generator stand-alone modelL-ΔP1＝(α+βk)PL；
According to regulated power α PL-ΔP1＝(α+βk)PLDetermining and changing the rotor rotating speed omega of a generator single-machine model of the synchronous machine, determining the frequency deviation after power fluctuation of the power system according to the rotor rotating speed omega, and determining the new energy ratio k of the energy power system according to the frequency deviation after power fluctuation of the power system.
Determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega, which specifically comprises the following steps:
when the single machine model of the synchronous generator adjusts the mechanical power of the single machine system model, the change rate of the mechanical power of the single machine model of the synchronous generator after the power fluctuation of the single machine system model is determined as follows:
if the difference adjusting coefficient of the speed regulator of the single-machine model of the generator of the synchronous machine is sigma, the change rate of the rotating speed of the rotor is as follows:
Δω(％)＝-σΔPT(％)
the rotor speed ω after the power fluctuation of the power system is:
determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega as follows:
and the value of the difference adjusting coefficient sigma of the single-machine model speed regulator of the synchronous generator is between 0.04 and 0.05.
Determining the new energy ratio k of the energy power system specifically comprises the following steps:
frequency deviation after determining power fluctuation of power system
When the absolute value of β is 9% -11%,
the present invention also provides a system 200 for determining a maximum ratio of new energy in an electrical power system, as shown in fig. 1, comprising:
the synchronization module 201 is used for establishing a new energy generator single machine model and a synchronous generator single machine model according to a new energy power system;
the first parameter obtaining module 202 is used for injecting power P into the bus by the new energy generator single machine modelrAnd injecting electromagnetic power P into the bus by the single-machine model of the synchronous generatorsDetermining the electromagnetic power P absorbed by the load of the electrical power systemLDetermining PL、PrAnd PsA relation with a new energy ratio k;
absorbing electromagnetic power P with electric power system loadLAs reference values, the relation is as follows: pr＝kPL
Ps＝(1-k)PL。
The second parameter obtaining module 203 determines P when the bus injected electromagnetic power is balanced in real time and is in a steady states+Pr＝PL；
When the load absorbs the electromagnetic power with the variable quantity of delta P, the delta P is α PLThe maximum generated power of the new energy source capable of providing the compensation unbalanced power is β times, and the unbalanced power is α<Determining unbalanced power delta P of new energy single-machine model when 0 time is up1(ii) a A third parameter obtaining module 204, configured to obtain the unbalanced power Δ P when the new energy single machine model is balanced1In case of not satisfying the unbalanced power to be compensated, according to Δ P1Determining the regulated power α P of the unbalanced-balanced power that needs to be provided by the synchronous generator stand-alone modelL-ΔP1＝(α+βk)PL；
A fourth parameter obtaining module 205 for obtaining α P according to the adjusted powerL-ΔP1＝(α+βk)PLDetermining and changing the rotor rotating speed omega of a generator single-machine model of the synchronous machine, determining the frequency deviation after power fluctuation of the power system according to the rotor rotating speed omega, and determining the new energy ratio k of the energy power system according to the frequency deviation after power fluctuation of the power system.
Determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega, which specifically comprises the following steps:
when the single machine model of the synchronous generator adjusts the mechanical power of the single machine system model, the change rate of the mechanical power of the single machine model of the synchronous generator after the power fluctuation of the single machine system model is determined as follows:
if the difference adjusting coefficient of the speed regulator of the single-machine model of the generator of the synchronous machine is sigma, the change rate of the rotating speed of the rotor is as follows:
Δω(％)＝-σΔPT(％)
the rotor speed ω after the power fluctuation of the power system is:
determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega as follows:
and the value of the difference adjusting coefficient sigma of the single-machine model speed regulator of the synchronous generator is between 0.04 and 0.05.
Determining the new energy ratio k of the energy power system specifically comprises the following steps:
frequency deviation after determining power fluctuation of power system
When the absolute value of β is 9% -11%,
the invention provides a method for calculating the maximum new energy absorption ratio of a system, which allows a power system to consider that the steady-state frequency deviation amount is not out of limit under unbalanced power after large-scale new energy power generation with frequency modulation capability is accessed, and can be used for analyzing and running an actual power grid.
The method can simplify the analysis and calculation difficulty while ensuring the accuracy of the calculation result, has higher engineering applicability, and can effectively ensure the safe and stable operation of the power grid.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A method for determining a new energy maximum ratio for an electric power system, the method comprising:
establishing a new energy generator single machine model and a synchronous generator single machine model according to the new energy power system;
determining injection power P of single-machine model of new energy generator to busrInjecting electromagnetic power P into bus by single-machine model of synchronous generatorsThe load of the power system absorbs the electromagnetic power PLAnd determining PL、PrAnd PsA relation with a new energy ratio k;
when the bus is injected with electromagnetic power in real time balance and in steady state, P is determineds+Pr＝PL；
When the load absorbs the electromagnetic power with the variable quantity of delta P, the delta P is α PLThe maximum generated power of the new energy source capable of providing the compensation unbalanced power is β times, and the unbalanced power is α<Determining unbalanced power delta P of new energy single-machine model when 0 time is up1(ii) a Unbalanced power delta P when new energy single machine model is balanced1In case of not satisfying the unbalanced power to be compensated, according to Δ P1Determining the regulated power α P of the unbalanced-balanced power that needs to be provided by the synchronous generator stand-alone modelL-ΔP1＝(α+βk)PL；
According to regulated power α PL-ΔP1＝(α+βk)PLDetermining and changing the rotor rotating speed omega of a generator single-machine model of the synchronous machine, determining the frequency deviation after power fluctuation of the power system according to the rotor rotating speed omega, and determining the new energy ratio k of the energy power system according to the frequency deviation after power fluctuation of the power system.
2. The method according to claim 1, wherein the determining the frequency deviation after the power fluctuation of the power system according to the rotor speed ω comprises:
when the single machine model of the synchronous generator adjusts the mechanical power of the single machine system model, the change rate of the mechanical power of the single machine model of the synchronous generator after the power fluctuation of the single machine system model is determined as follows:
according to the mechanical power change rate of the single-machine model of the synchronous generator, the change rate of the rotating speed of the rotor is determined as follows:
Δω(％)＝-σΔPT(％)
wherein, sigma is the difference adjustment coefficient of the speed regulator of the single-machine model of the synchronous generator;
the rotor speed ω after the power fluctuation of the power system is:
determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega as follows:
3. the method of claim 1, said PL、PrAnd PsAbsorbing electromagnetic power P by electric power system load according to a relation formula of new energy ratio k of new energy electric power systemLAs reference values, the relation is as follows:
Pr＝kPL
Ps＝(1-k)PL。
4. the method of claim 1, wherein the difference coefficient σ of the speed regulator of the stand-alone model of the synchronous generator is between 0.04 and 0.05.
5. The method according to claim 1, wherein the determining the new energy ratio k of the energy power system specifically comprises:
frequency deviation after determining power fluctuation of power system
When the absolute value of β is 9% -11%,
6. a system for determining a new energy maximum ratio for an electrical power system, the system comprising:
the synchronization module is used for establishing a new energy generator single machine model and a synchronous generator single machine model according to the new energy power system;
the first parameter acquisition module is used for determining the injection power P of the single-machine model of the new energy generator to the busrInjecting electromagnetic power P into bus by single-machine model of synchronous generatorsThe load of the power system absorbs the electromagnetic power PLAnd determining PL、PrAnd PsA relation with a new energy ratio k;
the second parameter acquisition module is used for determining P when the electromagnetic power injected into the bus is balanced in real time and is in a steady states+Pr＝PL；
When the load absorbs the electromagnetic power with the variable quantity of delta P, the delta P is α PLThe maximum generated power of the new energy source capable of providing the compensation unbalanced power is β times, and the unbalanced power is α<Determining unbalanced power delta P of new energy single-machine model when 0 time is up1(ii) a A third parameter obtaining module, for obtaining the unbalanced power delta P when the new energy single machine model is balanced1In case of not satisfying the unbalanced power to be compensated, according to Δ P1Determining the regulated power α P of the unbalanced-balanced power that needs to be provided by the synchronous generator stand-alone modelL-ΔP1＝(α+βk)PL；
A fourth parameter obtaining module for obtaining α P according to the regulated powerL-ΔP1＝(α+βk)PLDetermining and changing the rotor rotating speed omega of a generator single-machine model of the synchronous machine, determining the frequency deviation after power fluctuation of the power system according to the rotor rotating speed omega, and determining the new energy ratio k of the energy power system according to the frequency deviation after power fluctuation of the power system.
7. The system according to claim 6, wherein the determining the frequency deviation after the power fluctuation of the power system according to the rotor speed ω comprises:
when the single machine model of the synchronous generator adjusts the mechanical power of the single machine system model, the change rate of the mechanical power of the single machine model of the synchronous generator after the power fluctuation of the single machine system model is determined as follows:
if the difference adjusting coefficient of the speed regulator of the single-machine model of the generator of the synchronous machine is sigma, the change rate of the rotating speed of the rotor is as follows:
Δω(％)＝-σΔPT(％)
the rotor speed ω after the power fluctuation of the power system is:
determining the frequency deviation after the power fluctuation of the power system according to the rotor rotating speed omega as follows:
8. the system of claim 6, said PL、PrAnd PsAbsorbing electromagnetic power P by electric power system load according to a relation formula of new energy ratio k of new energy electric power systemLAs reference values, the relation is as follows: pr＝kPL
Ps＝(1-k)PL。
9. The system of claim 6, wherein the difference coefficient σ of the speed regulator of the stand-alone model of the synchronous generator is between 0.04 and 0.05.
10. The system according to claim 6, wherein the determining the new energy ratio k of the energy power system is specifically:
when determining power system power waveFrequency deviation after motion
When the absolute value of β is 9% -11%,
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