CN113268007A - Wind power plant energy storage protection simulation test system and method - Google Patents
Wind power plant energy storage protection simulation test system and method Download PDFInfo
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Abstract
The invention provides a simulation test system and method for energy storage protection of a wind power plant, wherein the system comprises the following components: the method comprises the following steps of constructing a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model on a simulation platform; the power grid load simulation model, the wind power plant simulation model and the energy storage system simulation model are connected with one another, and the wind power plant simulation model and the energy storage system simulation model are used for being connected with the relay protection device through an interface of the simulation platform; the power grid load simulation model is used for simulating the operating parameters of the wind power plant and the energy storage system; the wind power plant simulation model and the energy storage system simulation model are used for outputting an operation condition according to the operation parameters so as to enable the relay protection device to execute a first protection action; the effectiveness of the protection strategy of the relay protection device is verified by testing the wind power plant under different operating conditions, and the correctness and reliability of the control protection strategy and logic can be effectively checked and optimized.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a simulation test system and method for energy storage protection of a wind power plant.
Background
With the gradual depletion of fossil fuel reserves and the aggravation of environmental pollution pressure, wind energy, which is an inexhaustible clean energy, is increasingly paid attention from various countries, and has become an important source for solving the problem of energy shortage. However, due to the characteristics of randomness and volatility of wind energy, the output power of the wind power plant is determined to present volatility and uncertainty, peak load regulation and frequency modulation of a power grid are influenced to a certain extent, and the wind power generation cost is too high, so that the wind power generation cannot compete with the traditional power generation mode. At the moment, the energy storage system is combined with wind power generation by virtue of the advantages of fast working condition conversion, flexible operation mode, high efficiency and the like, so that the power supply reliability and the power supply quality of the wind power plant are effectively improved, and the energy storage system has a wide development prospect.
However, as a protection device for core devices of an energy storage system, a corresponding test platform is currently lacking to verify the effectiveness of the protection policy. Although the traditional dynamic simulation experiment can carry out peripheral tests on the aspects of electromagnetic compatibility, interference resistance, communication and the like on the protection device, the correctness and reliability of a control protection strategy and logic are difficult to detect.
Therefore, the prior art is in need of further improvement.
Disclosure of Invention
Therefore, it is necessary to provide a simulation test system and method for energy storage protection of a wind farm in order to solve the above technical problems.
In one embodiment, a wind farm energy storage protection simulation test system is provided, and the system comprises: the method comprises the following steps of constructing a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model on a simulation platform;
the power grid load simulation model, the wind power plant simulation model and the energy storage system simulation model are connected with one another, and the wind power plant simulation model and the energy storage system simulation model are used for being connected with a relay protection device through an interface of the simulation platform;
the power grid load simulation model is used for simulating operating parameters of a wind power plant and an energy storage system;
the wind power plant simulation model and the energy storage system simulation model are used for outputting operation conditions according to operation parameters so that the relay protection device can execute a first protection action.
In one embodiment, the wind farm energy storage protection simulation test system further comprises a relay protection simulation model constructed on the simulation platform, and the relay protection simulation model is respectively connected with the wind farm simulation model and the energy storage system simulation model; the relay protection simulation model is used for executing a second protection action according to the operation condition; and the relay protection simulation model is constructed according to the actual structure of the relay protection device.
In one embodiment, the wind farm energy storage protection simulation test system further comprises a detection module, and the detection module is connected with the relay protection simulation model and the relay protection device; the detection module is used for detecting the effectiveness of a protection strategy of the relay protection device according to the first protection action and the second protection action.
In one embodiment, the protection strategy includes at least one of dc energy storage cell protection, energy storage inverter protection, ac filter protection, and ac transformer protection.
In one embodiment, the wind farm simulation model is constructed according to the actual structure of a wind farm;
and/or the energy storage system simulation model is constructed according to the actual structure of the energy storage system.
In one embodiment, the operating parameters include grid parameters and load parameters;
the power grid parameters comprise at least one of voltage, frequency, phase and analog fault device;
the load parameter includes at least one of voltage, current, active, reactive, and power factor.
According to the wind power plant energy storage protection simulation test system, a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model are built on a simulation platform to form a wind power plant-energy storage system-relay protection device hardware-in-the-loop test platform, namely a wind power plant energy storage protection simulation test platform; the power grid load simulation model simulates the operating parameters of the wind power plant and the energy storage system, and tests whether the relay protection device can act correctly when the energy storage system fails under different operating conditions of the wind power plant; when the energy storage system works normally, whether the relay protection device can not be operated by mistake or not is judged, so that the effectiveness of a protection strategy of the relay protection device is verified, and the correctness and the reliability of a control protection strategy and logic can be effectively checked and optimized.
In one embodiment, a wind farm energy storage protection simulation test method is provided, and is applied to the wind farm energy storage protection simulation test system of any one of the embodiments, and the method includes:
constructing a wind power plant simulation model;
constructing an energy storage system simulation model;
constructing a power grid load simulation module, and simulating operating parameters of a wind power plant and an energy storage system;
based on the wind power plant simulation model and the energy storage system simulation model, obtaining the operation conditions of the wind power plant simulation model and the energy storage system simulation model according to the operation parameters;
inputting the operation condition to a relay protection device to obtain a first protection action of the relay protection device;
and detecting the effectiveness of a protection strategy of the relay protection device according to the first protection action.
In one embodiment, after the step of obtaining the operating conditions of the wind farm simulation model and the energy storage system simulation model according to the operating parameters based on the wind farm simulation model and the energy storage system simulation model, the method further includes:
constructing a relay protection simulation model according to the actual structure of the relay protection device;
inputting the operating condition into the relay protection simulation model to obtain a second protection action of the relay protection simulation model;
the step of detecting the effectiveness of the protection strategy of the relay protection device according to the first protection action comprises:
and detecting the effectiveness of the protection strategy according to the first protection action and the second protection action.
In one embodiment, the step of detecting the validity of the protection policy according to the first protection action and the second protection action includes:
detecting whether the first protection action and the second protection action are the same;
when the first protection action and the second protection action are detected to be the same, judging that the protection strategy is available;
and when the first protection action is detected to be different from the second protection action, judging that the protection strategy is invalid.
In one embodiment, the step of constructing the wind farm simulation model includes:
constructing a wind power plant simulation model according to the actual structure of the wind power plant; and/or
The step of constructing the energy storage system simulation model comprises the following steps:
and constructing the energy storage system simulation model according to the actual structure of the energy storage system.
According to the wind power plant energy storage protection simulation test method, a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model are built on a simulation platform to form a wind power plant-energy storage system-relay protection device hardware-in-the-loop test platform, namely a wind power plant energy storage protection simulation test platform; the power grid load simulation model simulates the operating parameters of the wind power plant and the energy storage system, and tests whether the relay protection device can act correctly when the energy storage system fails under different operating conditions of the wind power plant; when the energy storage system works normally, whether the relay protection device can not be operated by mistake or not is judged, so that the effectiveness of a protection strategy of the relay protection device is verified, and the correctness and the reliability of a control protection strategy and logic can be effectively checked and optimized.
Drawings
FIG. 1 is a block diagram of a simulation test system for energy storage protection of a wind farm in one embodiment;
FIG. 2 is a schematic circuit diagram of a wind farm energy storage protection simulation test system in one embodiment;
FIG. 3 is a schematic flow chart of a simulation test method for energy storage protection of a wind farm in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, a wind farm energy storage protection simulation test system is provided, and the system comprises: the method comprises the following steps of constructing a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model on a simulation platform;
the power grid load simulation model, the wind power plant simulation model and the energy storage system simulation model are connected with one another, and the wind power plant simulation model and the energy storage system simulation model are used for being connected with a relay protection device through an interface of the simulation platform;
the power grid load simulation model is used for simulating operating parameters of a wind power plant and an energy storage system;
the wind power plant simulation model and the energy storage system simulation model are used for outputting operation conditions according to operation parameters so that the relay protection device can execute a first protection action.
According to the wind power plant energy storage protection simulation test system, a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model are built on a simulation platform to form a wind power plant-energy storage system-relay protection device hardware-in-the-loop test platform, namely a wind power plant energy storage protection simulation test platform; the power grid load simulation model simulates the operating parameters of the wind power plant and the energy storage system, and tests whether the relay protection device can act correctly when the energy storage system fails under different operating conditions of the wind power plant; when the energy storage system works normally, whether the relay protection device can not be operated by mistake or not is judged, so that the effectiveness of a protection strategy of the relay protection device is verified, and the correctness and the reliability of a control protection strategy and logic can be effectively checked and optimized.
Referring to fig. 1, in one embodiment, a simulation test system 20 for energy storage protection of a wind farm is provided, the system including: a wind power plant simulation model 210, an energy storage system simulation model 220 and a power grid load simulation model 230 which are constructed on the simulation platform 200;
the power grid load simulation model 230, the wind power plant simulation model 210 and the energy storage system simulation model 220 are connected with each other, and the wind power plant simulation model 210 and the energy storage system simulation model 220 are used for being connected with a relay protection device 300 through an interface of the simulation platform 200;
the power grid load simulation model 230 is used for simulating operating parameters of a wind power plant and an energy storage system;
the wind power plant simulation model 210 and the energy storage system simulation model 220 are used for outputting an operation condition according to an operation parameter, so that the relay protection device 300 executes a first protection action.
Specifically, the structure of a wind power plant and an energy storage system is virtually simulated on a simulation platform of a computer, a simulation result is applied to a real relay protection device, the relay protection device can execute corresponding protection actions according to received working condition data of the wind power plant, and the effectiveness of a protection strategy of the relay protection device is detected by detecting the protection actions executed by the relay protection device, for example, whether the relay protection device executes the protection actions when a simulation power grid fails; for example, when the analog power grid is in normal operation, the relay protection device may malfunction. It will be appreciated that the emulation platform can be emulation software on a computer.
Specifically, the wind power plant simulation model and the energy storage system simulation model can be subjected to simulation according to the structures of the actual wind power plant and the energy storage system corresponding to the relay protection device, the wind power plant simulation model and the energy storage system simulation model with engineering precision are formed by combining with the characteristic curve of an actual product, and the wind power plant simulation model, the energy storage system simulation model and the power grid load simulation model are connected on a simulation platform according to the actual wind power plant structure.
Specifically, different operation conditions of the wind power plant simulation model and the energy storage system simulation model are simulated by adjusting parameters of the power grid load model, for example, the power grid load model is also internally provided with a fault simulator which can be used for simulating the fault condition of the power grid, so that the operation conditions of the wind power plant in various power grid states can be simulated and simulated.
Specifically, the emulation platform has rich I/O interfaces, for example, the I/O interfaces on the emulation platform include a high-speed analog output interface GTAO, a high-speed analog input interface GTAI, a high-speed digital output interface GTDO, and a high-speed digital input interface GTDI. Through the I/O interface, the real-time simulation platform can be connected with a relay protection device of the energy storage system to form a hardware-in-the-loop test platform of the wind power plant, the energy storage system and the relay protection device, the operation condition of the wind power plant and the energy storage system subjected to simulation is sent to the relay protection device, and whether the protection action of the relay protection device is accurate or not is detected so as to detect the effectiveness of a protection strategy of the relay protection device.
It can be understood that the wind power plant simulation model, the energy storage system simulation model and the power grid load model are constructed by users, various power grid states can be simulated according to requirements, whether the relay protection device operates corresponding protection actions or not is detected through the known simulated power grid operation states, and whether a protection strategy of the relay protection device is effective or not or whether the relay protection device fails or not can be accurately judged.
According to the wind power plant energy storage protection simulation test system, a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model are built on a simulation platform to form a wind power plant-energy storage system-relay protection device hardware-in-the-loop test platform, namely a wind power plant energy storage protection simulation test platform; the power grid load simulation model simulates the operating parameters of the wind power plant and the energy storage system, and tests whether the relay protection device can act correctly when the energy storage system fails under different operating conditions of the wind power plant; when the energy storage system works normally, whether the relay protection device can not be operated by mistake or not is judged, so that the effectiveness of a protection strategy of the relay protection device is verified, and the correctness and the reliability of a control protection strategy and logic can be effectively checked and optimized.
In one embodiment, the wind farm energy storage protection simulation test system further comprises a relay protection simulation model constructed on the simulation platform, and the relay protection simulation model is respectively connected with the wind farm simulation model and the energy storage system simulation model; the relay protection simulation model is used for executing a second protection action according to the operation condition; and the relay protection simulation model is constructed according to the actual structure of the relay protection device. Specifically, the relay protection simulation model is constructed according to an actual result of the relay protection device, the relay protection simulation module is consistent with the circuit structure and parameter setting of the relay protection device, and in the simulation platform, the internal circuit structure simulated by the relay protection simulation model has no fault condition, namely, under the condition that the relay protection simulation model is correctly built, accurate protection action can be executed according to the working condition output by the wind power plant simulation model and the energy storage system. The detection personnel only need carry out comparative analysis with first protection action and second protection action, can detect relay protection device whether break down, whether the protection strategy is effective to whether detection personnel can discern relay protection device whether break down fast accurately. Furthermore, the requirement on the professional skills of the detection personnel can be reduced, and the misjudgment is reduced. Further, a wind power plant-energy storage system-relay protection simulation model is formed by building a wind power plant simulation model, an energy storage system simulation model and a relay protection device simulation model, wherein the wind power plant-energy storage system-relay protection simulation model is tested according to national standards, and the wind power plant, the energy storage system and the relay protection simulation model with engineering precision are formed by combining with an actual product characteristic curve.
In one embodiment, the wind farm energy storage protection simulation test system further comprises a detection module, and the detection module is connected with the relay protection simulation model and the relay protection device; the detection module is used for detecting the effectiveness of a protection strategy of the relay protection device according to the first protection action and the second protection action. Specifically, the detection module may be a part of the simulation platform, or may be independently disposed. The detection module is respectively connected with the relay protection device and the relay protection simulation model to receive a first protection action output by the relay protection device and a second protection action output by the relay protection simulation model, and monitor whether the first protection action is matched with the second protection action, so that the effectiveness of a protection strategy of the relay protection device can be displayed more visually.
Referring to FIG. 2, in one embodiment, the wind farm simulation model 210 is constructed according to actual wind characteristics and installed capacity of the wind farm. Further, in one embodiment, the wind farm simulation model includes: the method comprises a wind turbine generator sub-model, a grid-connected converter system sub-model and a transformer sub-model, wherein the grid-connected converter system sub-model comprises the following steps: AC (Alternating Current)/DC (Direct Current) converters, DC bus capacitors and models of DC/AC converters. The key parameters of the wind power plant simulation model comprise: the capacity, alternating voltage, alternating current, direct current voltage, converter capacity and switching frequency of the wind turbine generator are tested according to the national standard, and a wind power plant simulation model with engineering precision is formed by combining an actual product characteristic curve.
Referring to fig. 2, in one embodiment, the energy storage system simulation model 220 is constructed according to the actual structure of the energy storage system, and includes models of a battery unit, an energy storage inverter, an ac filter, a transformer, a controller, and a dc-side/ac-side/grid-side contactor; wherein, the controller model mainly includes: BMS (Battery MANAGEMENT SYSTEM) BATTERY management system, energy storage inverter function control system (PQ/VF mode). The key parameters of the energy storage system simulation model are as follows: the method comprises the following steps of testing a battery series-parallel connection structure, battery capacity, battery power, battery voltage, inverter capacity, switching frequency, alternating current filter impedance, transformer capacity, a connection mode and the like according to the national standard, and forming an energy storage system simulation model with engineering precision by combining an actual product characteristic curve and a corresponding control strategy.
In one embodiment, the relay protection simulation model of the energy storage system is constructed according to the protection partition condition of the energy storage system. The formed relay protection simulation model comprises: the model comprises direct current energy storage battery unit protection, energy storage inverter protection, alternating current filter protection and alternating current transformer protection. The key parameters of the relay protection simulation model are as follows: the threshold value of each protection action and the division of the protection partitions (namely the matching of the main protection and the backup protection) are tested according to the national standard, and a relay protection simulation model with engineering precision is formed by combining an actual product characteristic curve and a corresponding protection strategy.
In the above embodiment, the national test standard of the wind farm is GB/T19963-2011 "technical specification for accessing the wind farm to the power system", the national test standard of the energy storage system is Q/GDW564-2010 "technical specification for accessing the energy storage system to the power distribution network", and the national test standard of the relay protection device is GB/T50062-2008 "design specification for relay protection and automation device of the power device".
In the embodiment, different operating conditions of the wind power plant are simulated by adjusting parameters of the power grid load simulation model, wherein the power grid model is also internally provided with a fault simulator and can be used for simulating the fault condition of the power grid.
The fault conditions of the energy storage system at least comprise overvoltage or low voltage of a battery unit, overcurrent of the battery unit, over-fast change rate of current/voltage of the battery, overvoltage/undervoltage of an alternating current/direct current side of an inverter, over-frequency/under-frequency of a power grid, isolated island caused by the fault of the power grid, harmonic overload and grounding short circuit/interphase short circuit of a grid-connected point.
In one embodiment, the protection strategy includes at least one of dc energy storage cell protection, energy storage inverter protection, ac filter protection, and ac transformer protection. The key parameters of the protection strategy are as follows: the threshold value of each protection action and the division of the protection partition, namely the coordination of the main protection and the backup protection.
In one embodiment, the wind farm simulation model is constructed according to the actual structure of a wind farm;
and/or the energy storage system simulation model is constructed according to the actual structure of the energy storage system.
In the embodiment, the wind power plant simulation model and the energy storage system simulation model are constructed by adopting the actual structures of the wind power plant and the energy storage system, and the wind power plant energy storage system protection strategy simulation model with engineering precision is formed by combining the actual product characteristic curve, so that the effectiveness of the protection strategy of the relay protection device can be more accurately judged.
In one embodiment, the operating parameters include grid parameters and load parameters;
the power grid parameters comprise at least one of voltage, frequency, phase and analog fault device;
the load parameter includes at least one of voltage, current, active, reactive, and power factor.
The following is a specific embodiment, a wind power plant energy storage protection simulation test system, and the system includes: the method comprises the following steps of constructing a wind power plant simulation model, an energy storage system simulation model, a relay protection simulation model and a power grid load simulation model on a simulation platform;
the power grid load simulation model, the wind power plant simulation model and the energy storage system simulation model are connected with one another, and the wind power plant simulation model and the energy storage system simulation model are used for being connected with a relay protection device through an interface of the simulation platform; the relay protection simulation model is respectively connected with the wind power plant simulation model and the energy storage system simulation model;
the power grid load simulation model is used for simulating operating parameters of a wind power plant and an energy storage system;
the wind power plant simulation model and the energy storage system simulation model are used for outputting an operation condition according to operation parameters so as to enable the relay protection device to execute a first protection action;
the relay protection simulation model is used for executing a second protection action according to the operation condition; the relay protection simulation model is constructed according to the actual structure of the relay protection device;
the wind power plant energy storage protection simulation test system further comprises: the detection module is connected with the relay protection simulation model and the relay protection device; the detection module is used for detecting the effectiveness of a protection strategy of the relay protection device according to the first protection action and the second protection action.
The wind power plant simulation model is constructed according to actual wind power characteristics and installed capacity of a wind power plant;
the energy storage system simulation model is constructed according to the actual structure of the energy storage system;
a relay protection simulation model of the energy storage system is constructed according to the protection partition condition of the energy storage system.
According to the wind power plant energy storage protection simulation test system, a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model are built on a simulation platform to form a wind power plant-energy storage system-relay protection device hardware-in-the-loop test platform, namely a wind power plant energy storage protection simulation test platform; the power grid load simulation model simulates the operating parameters of the wind power plant and the energy storage system, and tests whether the relay protection device can act correctly when the energy storage system fails under different operating conditions of the wind power plant; when the energy storage system works normally, whether the relay protection device can not be operated by mistake or not is judged, so that the effectiveness of a protection strategy of the relay protection device is verified, and the correctness and the reliability of a control protection strategy and logic can be effectively checked and optimized. Furthermore, the detection personnel only need to compare and analyze the first protection action and the second protection action, and whether the relay protection device breaks down or not can be detected, and whether the protection strategy is effective or not can be detected, so that the detection personnel can quickly and accurately distinguish whether the relay protection device breaks down or not. Furthermore, the requirement on the professional skills of the detection personnel can be reduced, and the misjudgment is reduced.
Referring to fig. 3, in one embodiment, a wind farm energy storage protection simulation test method is applied to the wind farm energy storage protection simulation test system in any of the above embodiments, and the method includes:
s110, constructing a wind power plant simulation model;
s120, constructing an energy storage system simulation model;
s130, constructing a power grid load simulation module, and simulating operating parameters of a wind power plant and an energy storage system;
s140, based on the wind power plant simulation model and the energy storage system simulation model, obtaining the operation conditions of the wind power plant simulation model and the energy storage system simulation model according to the operation parameters;
s150, inputting the operation condition to a relay protection device to obtain a first protection action of the relay protection device;
and S160, detecting the effectiveness of the protection strategy of the relay protection device according to the first protection action.
Specifically, the structure of the wind power plant and the energy storage system is virtually simulated on a simulation platform of the computer, the simulated result is applied to a real relay protection device, and the effectiveness of a protection strategy of the relay protection device is detected by detecting the protection action executed by the relay protection device. It will be appreciated that the emulation platform can be emulation software on a computer.
Specifically, the wind power plant simulation model and the energy storage system simulation model can be subjected to simulation according to the structures of the actual wind power plant and the energy storage system corresponding to the relay protection device, the wind power plant simulation model and the energy storage system simulation model with engineering precision are formed by combining with the characteristic curve of an actual product, and the wind power plant simulation model, the energy storage system simulation model and the power grid load simulation model are connected on a simulation platform according to the actual wind power plant structure.
Specifically, different operation conditions of the wind power plant simulation model and the energy storage system simulation model are simulated by adjusting parameters of the power grid load model, for example, the power grid load model is also internally provided with a fault simulator which can be used for simulating the fault condition of the power grid, so that the operation conditions of the wind power plant in various power grid states can be simulated and simulated.
Specifically, the emulation platform has rich I/O interfaces, for example, the I/O interfaces on the emulation platform include a high-speed analog output interface GTAO, a high-speed analog input interface GTAI, a high-speed digital output interface GTDO, and a high-speed digital input interface GTDI. Through the I/O interface, the real-time simulation platform can be connected with a relay protection device of the energy storage system to form a hardware-in-the-loop test platform of the wind power plant, the energy storage system and the relay protection device, the operation condition of the wind power plant and the energy storage system subjected to simulation is sent to the relay protection device, and whether the protection action of the relay protection device is accurate or not is detected so as to detect the effectiveness of a protection strategy of the relay protection device.
It can be understood that the wind power plant simulation model, the energy storage system simulation model and the power grid load model are constructed by users, various power grid states can be simulated according to requirements, whether the relay protection device operates corresponding protection actions or not is detected through the known simulated power grid operation states, and whether a protection strategy of the relay protection device is effective or not or whether the relay protection device fails or not can be accurately judged.
According to the wind power plant energy storage protection simulation test method, a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model are built on a simulation platform to form a wind power plant-energy storage system-relay protection device hardware-in-the-loop test platform, namely a wind power plant energy storage protection simulation test platform; the power grid load simulation model simulates the operating parameters of the wind power plant and the energy storage system, and tests whether the relay protection device can act correctly when the energy storage system fails under different operating conditions of the wind power plant; when the energy storage system works normally, whether the relay protection device can not be operated by mistake or not is judged, so that the effectiveness of a protection strategy of the relay protection device is verified, and the correctness and the reliability of a control protection strategy and logic can be effectively checked and optimized.
In one embodiment, after the step of obtaining the operating conditions of the wind farm simulation model and the energy storage system simulation model according to the operating parameters based on the wind farm simulation model and the energy storage system simulation model, the method further includes:
constructing a relay protection simulation model according to the actual structure of the relay protection device;
inputting the operating condition into the relay protection simulation model to obtain a second protection action of the relay protection simulation model;
the step of detecting the effectiveness of the protection strategy of the relay protection device according to the first protection action comprises:
and detecting the effectiveness of the protection strategy according to the first protection action and the second protection action.
Specifically, the relay protection simulation model is constructed according to an actual result of the relay protection device, the relay protection simulation module is consistent with the circuit structure and parameter setting of the relay protection device, and in the simulation platform, the internal circuit structure simulated by the relay protection simulation model has no fault condition, namely, under the condition that the relay protection simulation model is correctly built, accurate protection action can be executed according to the working condition output by the wind power plant simulation model and the energy storage system. The detection personnel only need carry out comparative analysis with first protection action and second protection action, can detect relay protection device whether break down, whether the protection strategy is effective to whether detection personnel can discern relay protection device whether break down fast accurately. Furthermore, the requirement on the professional skills of the detection personnel can be reduced, and the misjudgment is reduced. Further, a wind power plant-energy storage system-relay protection simulation model is formed by building a wind power plant simulation model, an energy storage system simulation model and a relay protection device simulation model, wherein the wind power plant-energy storage system-relay protection simulation model is tested according to national standards, and the wind power plant, the energy storage system and the relay protection simulation model with engineering precision are formed by combining with an actual product characteristic curve.
In one embodiment, the step of detecting the validity of the protection policy according to the first protection action and the second protection action includes:
detecting whether the first protection action and the second protection action are the same;
when the first protection action and the second protection action are detected to be the same, judging that the protection strategy is available;
and when the first protection action is detected to be different from the second protection action, judging that the protection strategy is invalid.
Specifically, the effectiveness of the protection strategy of the relay protection device can be displayed more visually by receiving a first protection action output by the relay protection device and a second protection action output by the relay protection simulation model and monitoring whether the first protection action is matched with the second protection action.
In one embodiment, the step of constructing the wind farm simulation model includes:
constructing a wind power plant simulation model according to the actual structure of the wind power plant; and/or
The step of constructing the energy storage system simulation model comprises the following steps:
and constructing the energy storage system simulation model according to the actual structure of the energy storage system.
Specifically, a wind power plant simulation model and an energy storage system simulation model are constructed by adopting the actual structures of a wind power plant and an energy storage system, and the wind power plant energy storage system protection strategy simulation model with engineering precision is formed by combining an actual product characteristic curve, so that the effectiveness of a relay protection device protection strategy can be more accurately judged.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A wind power plant energy storage protection simulation test system is characterized by comprising: the method comprises the following steps of constructing a wind power plant simulation model, an energy storage system simulation model and a power grid load simulation model on a simulation platform;
the power grid load simulation model, the wind power plant simulation model and the energy storage system simulation model are connected with one another, and the wind power plant simulation model and the energy storage system simulation model are used for being connected with a relay protection device through an interface of the simulation platform;
the power grid load simulation model is used for simulating operating parameters of a wind power plant and an energy storage system;
the wind power plant simulation model and the energy storage system simulation model are used for outputting operation conditions according to operation parameters so that the relay protection device can execute a first protection action.
2. The wind farm energy storage protection simulation test system according to claim 1, further comprising a relay protection simulation model constructed on the simulation platform, the relay protection simulation model being connected to the wind farm simulation model and the energy storage system simulation model, respectively; the relay protection simulation model is used for executing a second protection action according to the operation condition; and the relay protection simulation model is constructed according to the actual structure of the relay protection device.
3. The wind farm energy storage protection simulation test system according to claim 2, further comprising a detection module, wherein the detection module is connected with the relay protection simulation model and the relay protection device; the detection module is used for detecting the effectiveness of a protection strategy of the relay protection device according to the first protection action and the second protection action.
4. The wind farm energy storage protection simulation test system according to claim 3, wherein the protection strategy comprises at least one of DC energy storage battery cell protection, energy storage inverter protection, AC filter protection, and AC transformer protection.
5. The wind farm energy storage protection simulation test system according to claim 1, wherein the wind farm simulation model is constructed according to an actual structure of a wind farm;
and/or the energy storage system simulation model is constructed according to the actual structure of the energy storage system.
6. The wind farm energy storage protection simulation test system of claim 1, wherein the operating parameters comprise grid parameters and load parameters;
the power grid parameters comprise at least one of voltage, frequency, phase and analog fault device;
the load parameter includes at least one of voltage, current, active, reactive, and power factor.
7. A wind power plant energy storage protection simulation test method is applied to the wind power plant energy storage protection simulation test system in any one of claims 1 to 6, and is characterized by comprising the following steps:
constructing a wind power plant simulation model;
constructing an energy storage system simulation model;
constructing a power grid load simulation module, and simulating operating parameters of a wind power plant and an energy storage system;
based on the wind power plant simulation model and the energy storage system simulation model, obtaining the operation conditions of the wind power plant simulation model and the energy storage system simulation model according to the operation parameters;
inputting the operation condition to a relay protection device to obtain a first protection action of the relay protection device;
and detecting the effectiveness of a protection strategy of the relay protection device according to the first protection action.
8. The wind farm energy storage protection simulation test method according to claim 7, wherein after the step of obtaining the operating conditions of the wind farm simulation model and the energy storage system simulation model based on the wind farm simulation model and the energy storage system simulation model according to the operating parameters, the method further comprises:
constructing a relay protection simulation model according to the actual structure of the relay protection device;
inputting the operating condition into the relay protection simulation model to obtain a second protection action of the relay protection simulation model;
the step of detecting the effectiveness of the protection strategy of the relay protection device according to the first protection action comprises:
and detecting the effectiveness of the protection strategy according to the first protection action and the second protection action.
9. The wind farm energy storage protection simulation test method according to claim 8, wherein the step of detecting the validity of the protection strategy according to the first protection action and the second protection action comprises:
detecting whether the first protection action and the second protection action are the same;
when the first protection action and the second protection action are detected to be the same, judging that the protection strategy is available;
and when the first protection action is detected to be different from the second protection action, judging that the protection strategy is invalid.
10. The wind farm energy storage protection simulation test method according to claim 7,
the step of constructing the wind power plant simulation model comprises the following steps:
constructing a wind power plant simulation model according to the actual structure of the wind power plant; and/or
The step of constructing the energy storage system simulation model comprises the following steps:
and constructing the energy storage system simulation model according to the actual structure of the energy storage system.
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