# A Review of Distribution Grid Consumption Strategies Containing Distributed Photovoltaics
## 3 Distribution Grid Consumption Strategy with Distributed PV
### Voltage Control Strategies for Distribution Grids Containing Distributed Photovoltaics
#### 3.3.2 Voltage Coordination Control Methods  
The voltage coordinated control method refers to determining the parameters such as the voltage of the middle bookstore, the tap position of the on-load voltage regulator transformer, and the input amount of the reactive power compensation device through optimization calculation under the premise of meeting the system operation constraints, so as to realize the minimization of active network loss. Common methods include active control, tap device control, and coordinated control of multiple devices. Among the existing studies, researchers have mostly adopted the voltage control methods of sub-area, sub-cluster, and joint with energy storage. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Control Methods** & **Complexity Theory** & **Accurate** & **Advantages** & **Drawbacks** \\ \hline
**Constant** **pressure tracking** **method**[96] & Lower (one’s head) & Lower (one’s head) & Simple to implement and low complexity. & Inability to adapt to environmental changes and low tracking efficiency. \\ \hline
**Conductivity** **increment** **method**[97; 98] & Conveniently situated & Conveniently situated & Simple structure and easy to implement. & High hardware requirements and difficult step-size selection. \\ \hline
**Perturbation** **observation** **method**[99] & Relatively low & Lower (one’s head) & High tracking accuracy, easy to realize, and simple control structure. & Maximum point fluctuation is large, and misjudgment occurs. \\ \hline
**Intelligent algorithm** **[100; 101; 102] & Your (honorific) & Your (honorific) & Good accuracy and good adaptability to disturbances. & Theoretically feasible but not proven in practice. \\ \hline
**Deep learning** **algorithm**[103] & Your (honorific) & Your (honorific) & Less computationally intensive, more accurate, and faster learning and faster learning from experience. & Training samples are heterogeneous and need further optimization. \\ \hline
**Fuzzy control** **[104]** & Conveniently situated & High & Fast point-finding and anti-interference capability. & More computationally intensive and difficult to implement. \\ \hline
**Complex algorithm**[105] & Your (honorific) & Your (honorific) & High precision, fast response, and strong anti-interference ability. & High algorithmic complexity and more complex model building. \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Summary of advantages and disadvantages of common PV MPPT control methods. For example, the distribution network overvoltage responsibility sharing method with a high percentage of distributed PV access [106], whose central idea is to use the Shapley value method to calculate the percentage of overvoltage responsibility in the model, dividing the 33-node distribution network into five groups, and when overvoltage occurs, according to the different Shapley values, each group bears the corresponding overvoltage responsibility. There is also an energy storage voltage regulation control strategy based on cluster division [107], which firstly divides the distribution network into clusters and then, under the consideration of energy storage, allocates energy storage according to the cluster where the overrun node is located, and determines the power of the storage timing action at the time of the maximum gain, so as to achieve the suppression of voltage fluctuations. Joint energy storage has also been proposed to control the voltage [108], which first establishes the voltage stability model of the distributed photovoltaic storage system, then establishes the coordination model between PV and energy storage, and then achieves reasonable control of voltage. In order to visualize the partition control of PV, this paper draws on the partition diagram shown in the literature [109] to show the reader, and the PV partition structure diagram is shown in Figure 12.  
Figure 12 shows that partitioning is just an idea for subsequent studies, which can be performed both horizontally and across zones in combination with power electronic devices such as energy routers.